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BEGIN:VEVENT
SUMMARY:Morning Session: Improving measurement precision with Weak Measure
ments
DTSTART;VALUE=DATE-TIME:20141001T073000Z
DTEND;VALUE=DATE-TIME:20141001T093000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4837@indico.fysik.su.se
DESCRIPTION:Speakers: Yaron Kedem ()\nThe weak measurement protocol\, intr
oduced by Aharonov\,\nAlbert and Vaidman 25 years ago\, is now in widespre
ad use.\nThey showed that weak coupling of a measurement device to a\nquan
tum system\, together with a postselection\, can yield an\nintriguing quan
tity which was named The Weak Value. In some\ncontexts an observable on th
e system can be replaced\nby its Weak Value\, even though it can be much l
arger than\nany of its eigenvalues and is also complex in general. The\nme
thod of weak measurements have been shown to be highly\nuseful both for th
e analysis of fundamental issues in\nquantum mechanics and for practical a
pplications such as\nprecision improvement. We will start with a review of
the\nformalism and then discuss a recent development regarding\nthe enhan
cement of the Signal to Noise Ratio for precision\nmeasurements in the pre
sence of technical noise. We will see\nthat when imaginary weak values are
used\, such a noise can\nimprove the precision.\nReference: Y. Kedem\, Ph
ys. Rev. A 85\, 060102 (R) (2012)\n\nhttps://indico.fysik.su.se/event/3987
/contributions/4837/
LOCATION:Nordita\, Stockholm 132:028
URL:https://indico.fysik.su.se/event/3987/contributions/4837/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Pairing and quarteting in proton-neutron systems
DTSTART;VALUE=DATE-TIME:20140918T092000Z
DTEND;VALUE=DATE-TIME:20140918T100000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4838@indico.fysik.su.se
DESCRIPTION:Speakers: Nicolae Sandulescu ()\nThe common treatment of prot
on-neutron pairing in N ≅ Z\nnuclei relies on Cooper pairs and mean-fie
ld BCS-type\nmodels. However\, the nuclear interaction can induce\, throug
h\nthe isospin conservation\, quartet correlations of alpha type\nwhich mi
ght compete with the Cooper pairs. In fact\, for any\nisovector pairing in
teractions the ground state of N=Z\nsystems is accurately described not
by Cooper pairs but in\nterms of collective quartets [1\,2]. Cooper pairs
and\nquartets can however coexist in isospin asymmetric systems\nwith N>Z.
In this case the ground state of the isovector\npairing Hamiltonian can
be described with high precision as\na condensate of alpha-like quartets t
o which it is appended\na condensate of Cooper pairs built with the excess
neutrons\n[3\,4]. Quartets appear to be the relevant degrees of\nfreed
om for treating not only the isovector pairing but also\nthe competition b
etween the isoscalar and the isovector\nproton-neutron pairing in N=Z nucl
ei [5]. These facts \nindicate that the many-body pairing problem in N ≅
Z nuclei\ncan be more efficiently treated in calculation schemes based\no
n alpha-type quartets rather than on Cooper pairs and\nBCS-type models.\n1
.N. Sandulescu\, D. Negrea\, J. Dukelski\, C. W. Johnson\,\nPhys. Rev. C85
\, 061303 (R) (2012)\; 2. N. Sandulescu\, D.\nNegrea\, C. W. Johnson\, Phy
s. Rev. C86\, 041302 (R) (2012)\; 3.\nM. Sambataro and N. Sandulescu\, Phy
s Rev. C88\, 061303\n(R)(2013) \; 4. D. Negrea and N. Sandulescu\, Phys. R
ev. C\n(2014)\, in press\; 5. M. Sambataro\, N. Sandulescu and C. W.\nJohn
son\, in preparation\n\nhttps://indico.fysik.su.se/event/3987/contribution
s/4838/
LOCATION:Nordita\, Stockholm FP41
URL:https://indico.fysik.su.se/event/3987/contributions/4838/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Morning Session: Alpha Condensates. Alpha-decay: a computational c
hallenge
DTSTART;VALUE=DATE-TIME:20140930T073000Z
DTEND;VALUE=DATE-TIME:20140930T093000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4839@indico.fysik.su.se
DESCRIPTION:Speakers: Doru Sabin Delion ()\, Peter Schuck ()\nAlpha-decay:
a computational challenge\n D.S. Delion\, R.J. Liotta\, and A.
Dumitrescu\nThe microscopic description of alpha decay widths is an old\n
but still challenging issue. The standard mean field plus\nresidual intera
ction is not able to reproduce the absolute\nvalue of the decay width. We
propose two ways to cure this\ndefficiency\, namely by introducing a new s
ingle particle\ndiagonalization basis with two harmonic oscillator\nparame
ters [1] and by increasing proton-neutron correlations\nthrough a surface
cluster component in addition to the\nstandard nuclear the mean field [2].
We describe alpha decay\nfine structure by using a common approach for sp
herical\,\ntransitional and deformed nuclei [3]. The investigation of\nthe
alpha decay fine structure is a powerfull tool to probe\nnuclear structur
e. We use projected coherent states to\ndescribe the structure of daugher
nuclei and a\nquadrupole-quadrupole alpha-core interaction for alpha\ntran
sitions to excited states. It turns out that the\nstrength of this interac
tion\, reproducing alpha transitions\nto 2+ states\, is proportional to t
he clustering\nprobability. Predictions for electromagnetic and alpha\ntr
ansitions to excited state are made for all available\neven-even emitters.
The coupled channel analysis for alpha\ntransitions in odd mass nuclei is
proposed as a promising\ntool to investigate nuclear structure\, by the u
sing both\nspectroscopic and alpha decay data.\nThis work was supported by
the strategic grant\nPOSDRU/159/1.5/S/137750 and by the grant\nPN-II-ID-P
CE-2011-3-0092 of the Romanian ANCS.\n[1] D.S. Delion\, A. Insolia\, R.J.
Liotta\, Physical Review C\n54\, 292 (1996).\n[2] D.S. Delion\, R.J. Liott
a\, Physical Review C 87\, 024309\n(2013).\n[3] D.S. Delion\, A. Dumitresc
u\, Physical Review C 87\,\n041302(R) (2013).\n\nhttps://indico.fysik.su.
se/event/3987/contributions/4839/
LOCATION:Nordita\, Stockholm 132:028
URL:https://indico.fysik.su.se/event/3987/contributions/4839/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Lunch
DTSTART;VALUE=DATE-TIME:20140918T110000Z
DTEND;VALUE=DATE-TIME:20140918T130000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4840@indico.fysik.su.se
DESCRIPTION:https://indico.fysik.su.se/event/3987/contributions/4840/
LOCATION:Nordita\, Stockholm Albanova Restaurant
URL:https://indico.fysik.su.se/event/3987/contributions/4840/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Morning Session: Dynamics of Quantum Open Systems
DTSTART;VALUE=DATE-TIME:20140929T073000Z
DTEND;VALUE=DATE-TIME:20140929T093000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4841@indico.fysik.su.se
DESCRIPTION:Speakers: Vidar Gudmundsson ()\nChair: Jonas Larson\n\nhttps:/
/indico.fysik.su.se/event/3987/contributions/4841/
LOCATION:Nordita\, Stockholm 132:028
URL:https://indico.fysik.su.se/event/3987/contributions/4841/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Toward model-independent calculations of atomic nuclei
DTSTART;VALUE=DATE-TIME:20140918T070000Z
DTEND;VALUE=DATE-TIME:20140918T074000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4842@indico.fysik.su.se
DESCRIPTION:Speakers: Thomas Pappenbrock ()\nThis talk reviews recent resu
lts of coupled-cluster\ncalculations for rare isotopes\, optimization of i
nteraction\nfrom chiral effective field theory\, and finite size effects\n
in the oscillator basis.\n\nhttps://indico.fysik.su.se/event/3987/contribu
tions/4842/
LOCATION:Nordita\, Stockholm FP41
URL:https://indico.fysik.su.se/event/3987/contributions/4842/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Highly Frustrated Spin-Lattice Models of Magnetism and Their Quant
um Phase Transitions: A Microscopic Treatment via the Coupled Cluster Meth
od
DTSTART;VALUE=DATE-TIME:20140918T074000Z
DTEND;VALUE=DATE-TIME:20140918T082000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4843@indico.fysik.su.se
DESCRIPTION:Speakers: Raymond Bishop ()\nThe coupled cluster method [1] (C
CM) is one of the most\npervasive\, most powerful\, and most successful of
all ab\ninitio formulations of quantum many-body theory. It has\nprobabl
y been applied to more systems in quantum field\ntheory\, quantum chemistr
y\, nuclear\, subnuclear\, condensed\nmatter and other areas of physics th
an any other competing\nmethod. The CCM has yielded numerical results whi
ch are\namong the most accurate available for an incredibly wide\nrange of
both finite and extended physical systems defined\non a spatial continuum
. These range from atoms and molecules\nof interest in quantum chemistry\,
where the method has long\nbeen the recognized "gold standard"\, to atomi
c nuclei\; from\nthe electron gas to dense nuclear and baryonic matter\; a
nd\nfrom models in quantum optics\, quantum electronics\, and\nsolid-state
optoelectronics to field theories of strongly\ninteracting nucleons and p
ions. \nThis widespread success for both finite and extended\nphysical sy
stems defined on a spatial continuum [2] has led\nto recent applications t
o corresponding quantum-mechanical\nsystems defined on an extended regular
spatial lattice. \nSuch lattice systems are nowadays the subject of inten
se\ntheoretical study. They include many examples of systems\ncharacterize
d by novel ground states which display quantum\norder in some region of th
e Hamiltonian parameter space\,\ndelimited by critical values which mark t
he corresponding\nquantum phase transitions. The quantum critical phenomen
a\noften differ profoundly from their classical counterparts\,\nand the su
btle\ncorrelations present usually cannot easily be treated by\nstandard m
any-body techniques (e.g.\, perturbation theory or\nmean-field approximati
ons). A key challenge for modern\nquantum many-body theory has been to dev
elop microscopic\ntechniques capable of handling both these novel and more
\ntraditional systems. Our recent work shows that the CCM is\ncapable of
bridging this divide. We have shown how the\nsystematic inclusion of mult
ispin correlations for a wide\nvariety of quantum spin-lattice problems ca
n be efficiently\nimplemented with the CCM [3]. The method is not restric
ted\nto bipartite lattices or to non-frustrated systems\, and can\nthus de
al with problems where most alternative techniques\,\ne.g.\, exact diagona
lization of small lattices or quantum\nMonte Carlo (QMC) simulations\, are
faced with specific\ndifficulties. \nIn this talk I describe our recent w
ork that has applied the\nCCM to strongly interacting and highly frustrate
d\nspin-lattice models of interest in quantum magnetism\,\nespecially in t
wo spatial dimensions. I show how the CCM\nmay readily be\nimplemented to
high orders in systematically improvable\nhierarchies of approximations\,
e.g.\, in a localized\nlattice-animal-based subsystem (LSUB$m$) scheme\,
by the use\nof computer-algebraic techniques. Values for ground-state (an
d\nexcited-state) properties are obtained which are fully\ncompetitive wit
h those from other state-of-the-art methods\,\nincluding the much more com
putationally intensive QMC\ntechniques in the relatively rare (unfrustrate
d) cases where\nthe latter can be readily applied. I describe the method\
nitself\, and illustrate its ability to give accurate\ndescriptions of the
ground-state phase diagrams of a wide\nvariety of frustrated magnetic sys
tems via a number of\ntopical examples of its high-order implementations\,
from\namong a very large corpus of results for spin lattices. The\nraw L
SUB$m$ results are themselves generally excellent. I\nshow explicitly bot
h how\nthey converge rapidly and can also be accurately\nextrapolated in t
he truncation index\, $m \\to \\infty$\, to the\nexact limit.\n[1] R.F. Bi
shop\, in "Microscopic Quantum Many-Body Theories\nand Their Applications\
," (eds. J. Navarro and A. Polls)\,\nLecture Notes in Physics Vol. 510\
, Springer-Verlag\, Berlin\n(1998)\, 1.\n[2] R.F. Bishop\, Theor. Chim. Ac
ta 80 (1991)\, 95\; R.J.\nBartlett\, J. Phys. Chem. 93 (1989)\, 1697.\n[
3] D.J.J. Farnell and R.F. Bishop\, in "Quantum Magnetism\,"\n(eds. U. Sch
ollwöck\, J. Richter\, D.J.J. Farnell and R.F.\nBishop)\, Lecture Notes i
n Physics Vol. 645\, Springer-Verlag\,\nBerlin (2004)\, 307.\n\nhttps://i
ndico.fysik.su.se/event/3987/contributions/4843/
LOCATION:Nordita\, Stockholm FP41
URL:https://indico.fysik.su.se/event/3987/contributions/4843/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Coffe break
DTSTART;VALUE=DATE-TIME:20140918T082000Z
DTEND;VALUE=DATE-TIME:20140918T084000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4844@indico.fysik.su.se
DESCRIPTION:https://indico.fysik.su.se/event/3987/contributions/4844/
LOCATION:Nordita\, Stockholm FP41
URL:https://indico.fysik.su.se/event/3987/contributions/4844/
END:VEVENT
BEGIN:VEVENT
SUMMARY:AlbaNova Colloquium: From Materials to Cosmology\; Studying the Ea
rly Universe Under the Microscope
DTSTART;VALUE=DATE-TIME:20141002T130000Z
DTEND;VALUE=DATE-TIME:20141002T140000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4853@indico.fysik.su.se
DESCRIPTION:Speakers: Nicola Spaldin ()\nhttps://indico.fysik.su.se/event/
3987/contributions/4853/
LOCATION:Nordita\, Stockholm Oskar Kelin Auditorium\, AlbaNova Main Buildi
ng
URL:https://indico.fysik.su.se/event/3987/contributions/4853/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Nuclear physics: a laboratory for many-particle quantum mechanics
(Colloquium)
DTSTART;VALUE=DATE-TIME:20140918T130000Z
DTEND;VALUE=DATE-TIME:20140918T140000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4854@indico.fysik.su.se
DESCRIPTION:Speakers: George Bertsch ()\nNuclear structure physics has pre
sented a fruitful testing\nground for quantum many-body theory since its b
eginnings\nhalf a century ago. On the one hand\, the observed phenomena\nh
ave given rise to models that have been invaluable to\ninterpret the under
lying physics. On the other hand\, the\nquest to make a predictive theory
has given strong impetus\nto developing computational tools to solve the m
any-particle\nSchroedinger equation. I will review some of these\ntheoreti
cal highlights in nuclear structure\, ranging from \nthe modeling and comp
utation of few-body systems to the\nmany-particle finite systems represent
ed by our heavy\nnuclei. Among the models I discuss are the unitary-limit
\nfermionic Hamiltonian\, the Nilsson model of nuclear\ndeformations\, and
the Richardson-Gaudin model of pairing. \nComputational strategies that
have been very successful in\ndifferent contexts are the Monte-Carlo metho
ds\, the\nmulti-configuration shell model\, and the extensions of\nmean-fi
eld\ntheory to restore broken symmetries.\n\nhttps://indico.fysik.su.se/ev
ent/3987/contributions/4854/
LOCATION:Nordita\, Stockholm Oskar Klein room
URL:https://indico.fysik.su.se/event/3987/contributions/4854/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Time-Dependent Dynamics of Fermionic Superfluids: from cold atomic
gases\, to nuclei and neutron stars
DTSTART;VALUE=DATE-TIME:20140915T090000Z
DTEND;VALUE=DATE-TIME:20140915T094000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4855@indico.fysik.su.se
DESCRIPTION:Speakers: Aurel Bulgac ()\nThe fascinating dynamics of superfl
uids\, often referred to\nas quantum coherence revealed at macroscopic sca
le\, has\nchallenged both experimentalists and theorists for more than\na
century now\, starting with electron superconductivity\ndiscovered in 1911
by Heike Kamerlingh Onnes. The\nphenomenological two-fluid model of Tizsa
and its final\nformulation due to Landau\, is ultimately a classical\napp
roach in which Planck’s constant never appears and it is\nunable to desc
ribe the generation and dynamics of the\nquantized vortices\, which are th
e hallmark characteristics\nof superfluidity. Various quantum mechanical\n
phenomenological models have been developed over the years\nby London\, On
sager\, Feynman\, Ginzburg and Landau\, Abrikosov\,\nand many others\, but
truly microscopic approaches are very\nscarce. The Gross-Pitaevskii equat
ion was for many years the\nonly example\, but it is applicable only to a
weakly\ninteracting Bose gas at zero temperature and it has been\nused to
describe the large variety of experiments in cold\natomic Bose gases. In t
he case of fermionic superfluids only\na time-dependent mean filed approac
h existed for a long\ntime\, which is known to be quite inaccurate. With t
he\nemergence of the Density Functional Theory and its\ntime-dependent ext
ension it became relatively recently\npossible to have a truly microscopic
approach of their\ndynamics\, which proves to be extremely relabel in pre
dicting\nand describing various experimental results in cold atomic\nfermi
onic gases\, nuclei and which can be used as well to\nmake predictions abo
ut the nature and dynamics of vortices\nin the neutron star crust. I will
describe the\ntime-dependent superfluid local density approximation\, whic
h\nis an adiabatic extension of the density functional theory\nto superflu
id Fermi systems and their real-time dynamics.\nThis new theoretical frame
work has been used to\ndescribe/predict a range of phenomena in cold atomi
c gases\nand nuclear collective motion: excitation of the Higgs modes\nin
strongly interacting Fermi superfluids\, generation of\nquantized vortices
\, crossing and reconnection of vortices\,\nexcitation of the superflow at
velocities above the critical\nvelocity\, excitation of quantum shock wav
es\, domain walls\nand vortex rings in superfluid atomic clouds\, and exci
tation\nof collective states in nuclei. This approach is the natural\nfram
ework to describe in a time-dependent framework various\nlow energy nuclea
r reactions and in particular large\namplitude collective motion and nucle
ar fission and the\nnumerical implementation of this formalism requires th
e\nlargest supercomputers available to science today.\n\nhttps://indico.fy
sik.su.se/event/3987/contributions/4855/
LOCATION:Nordita\, Stockholm FP41
URL:https://indico.fysik.su.se/event/3987/contributions/4855/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Morning Session: Introduction to Monte Carlo simulations of neutro
ntransport in nuclear reactors. Development of new Monte Carlo methods for
reactorphysics applications
DTSTART;VALUE=DATE-TIME:20141007T073000Z
DTEND;VALUE=DATE-TIME:20141007T093000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4856@indico.fysik.su.se
DESCRIPTION:Speakers: Jan Dufek ()\n1)Introduction to Monte Carlo simulati
ons of neutron\ntransport in nuclear reactors\n---------------------------
-------------------------------------------\n2) Development of new Monte C
arlo methods for reactor\nphysics applications\n\nhttps://indico.fysik.su.
se/event/3987/contributions/4856/
LOCATION:Nordita\, Stockholm 132:028
URL:https://indico.fysik.su.se/event/3987/contributions/4856/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Afternoon Session: On the entropy for quantum unstable states
DTSTART;VALUE=DATE-TIME:20141007T123000Z
DTEND;VALUE=DATE-TIME:20141007T131000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4857@indico.fysik.su.se
DESCRIPTION:Speakers: Osvaldo Civitarese ()\nWe discuss some of the prescr
iptions available in the literature\nabout the definition of thermodynamic
al observables for\nquantum unstable states. The formalism is based on the
use\nof resonances (states with complex energies) in the\npath-integral f
ormulation of path integrals and generating\nfunctions. The results are co
nfronted mathematical oriented\nformulations of the problem.\n\nhttps://in
dico.fysik.su.se/event/3987/contributions/4857/
LOCATION:Nordita\, Stockholm 132:028
URL:https://indico.fysik.su.se/event/3987/contributions/4857/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Morning Session: Strongly correlated electron systems
DTSTART;VALUE=DATE-TIME:20141008T073000Z
DTEND;VALUE=DATE-TIME:20141008T093000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4858@indico.fysik.su.se
DESCRIPTION:Speakers: Alexandre Leprévost ()\, Olivier Juillet ()\nOlivie
r Juillet\nIntertwined orders in strongly correlated electron systems.\n\n
The quantum phase diagram of the two-dimensional Hubbard\nmodel is investi
gated through the mixing of unrestricted\nHartree-Fock and BCS wave-functi
ons with symmetry\nrestoration before variation. The spin\, charge\, and\n
superconducting orders entailed in such correlated states\nwill be discuss
ed as well as their evolution with hole\ndoping and the on-site Coulomb re
pulsion. The relevance of\nthe approach against exact results or numerical
simulations\nwhen available will also be addressed.\n--------------------
-------------------------------------------------\nAlexandre Leprévost\nE
xact ground state of strongly correlated electron systems\nfrom symmetry-r
estored wave-functions\n\nThe four site Hubbard model is considered from t
he exact\ndiagonalization and variational method points of view. We\nshow
that a symmetry projected mean-field theory recovers \nthe exact ground st
ate energy\, irrespective of the\ninteraction strength\, in contrast to th
e conventional\nGutzwiller wave-function that will be also considered.\n\n
https://indico.fysik.su.se/event/3987/contributions/4858/
LOCATION:Nordita\, Stockholm 132:028
URL:https://indico.fysik.su.se/event/3987/contributions/4858/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Morning Session: Approximate and exact Boltzmann machine learning
for the US stock market
DTSTART;VALUE=DATE-TIME:20141003T073000Z
DTEND;VALUE=DATE-TIME:20141003T093000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4859@indico.fysik.su.se
DESCRIPTION:Speakers: Stanislav Borysov ()\nhttps://indico.fysik.su.se/eve
nt/3987/contributions/4859/
LOCATION:Nordita\, Stockholm 132:028
URL:https://indico.fysik.su.se/event/3987/contributions/4859/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Afternoon Session: Mean field approaches
DTSTART;VALUE=DATE-TIME:20141003T123000Z
DTEND;VALUE=DATE-TIME:20141003T143000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4860@indico.fysik.su.se
DESCRIPTION:Speakers: Jie Meng ()\nhttps://indico.fysik.su.se/event/3987/c
ontributions/4860/
LOCATION:Nordita\, Stockholm 132:028
URL:https://indico.fysik.su.se/event/3987/contributions/4860/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Morning Session: Ab initio nuclear structure from lattice effectiv
e field theory
DTSTART;VALUE=DATE-TIME:20141006T073000Z
DTEND;VALUE=DATE-TIME:20141006T093000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4861@indico.fysik.su.se
DESCRIPTION:Speakers: Dean Lee ()\nI discuss recent results obtained using
lattice effective\nfield theory to probe nuclear structure. In particula
r I\npresent recent lattice calculations of the Hoyle state of\ncarbon-12
and whether or not light quark masses must be\nfine-tuned for the viabilit
y of carbon-based life.\n\nhttps://indico.fysik.su.se/event/3987/contribut
ions/4861/
LOCATION:Nordita\, Stockholm 132:028
URL:https://indico.fysik.su.se/event/3987/contributions/4861/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Computational challenges in modern nuclear physics
DTSTART;VALUE=DATE-TIME:20140926T073000Z
DTEND;VALUE=DATE-TIME:20140926T093000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4863@indico.fysik.su.se
DESCRIPTION:Speakers: Luis Robledo ()\, Zao-Chun Gao ()\nLuis Robledo\nCom
putational challenges in nuclear EDF calculations.\n----------------------
-------------------------------------------------\nZao-Chun Gao\nOverlaps
and matrix elements of physical operators between\narbitrary HFB states.\n
\nBeyond mean field methods have been widely used in various\nmany-body qu
antum systems. However\, there still are some\nproblems to be solved in th
e implementation of beyond mean\nfield calculations. Especially for system
s with large number\nof particles\, such as heavy nuclei\, the efficiency
of beyond\nmean \nfield calculations becomes a very serious problem. Recen
tly\,\nwe have tried to figure out a convenient way of calculating\nthe ov
erlap between arbitrary HFB vacua [1]. We also found\nsome compact formula
e for the matrix elements of physical\noperators (e.g. Hamiltonian) betwee
n arbitrary HFB\nmultiquasiparticle states [2]. These formulae may reduce
the\ncomputational time by several orders of magnitude when\napplied to ma
ny-body quantum system in a large Fock space.\n[1] Zao-Chun Gao\, Qing-Li
Hu\, Y. S. Chen Physics Letters B\n732 (2014)360.\n[2] Qing-Li Hu\, Zao-Ch
un Gao\, Y. S. Chen Physics Letters B\n734 (2014)162.\n\nhttps://indico.fy
sik.su.se/event/3987/contributions/4863/
LOCATION:Nordita\, Stockholm 132:028
URL:https://indico.fysik.su.se/event/3987/contributions/4863/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Morning Session: Quantum computing
DTSTART;VALUE=DATE-TIME:20141009T073000Z
DTEND;VALUE=DATE-TIME:20141009T093000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4865@indico.fysik.su.se
DESCRIPTION:Speakers: Hoshang HEYDARI ()\, Mohamed Bourennane ()\nHoshang
Heydare\nIntroduction\n---------------------------------------------------
-------------------\nMohamed Bourennane\nQuantum computing\n\nhttps://indi
co.fysik.su.se/event/3987/contributions/4865/
LOCATION:Nordita\, Stockholm 132:028
URL:https://indico.fysik.su.se/event/3987/contributions/4865/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Boattrip with lunch
DTSTART;VALUE=DATE-TIME:20140920T100000Z
DTEND;VALUE=DATE-TIME:20140920T130000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4866@indico.fysik.su.se
DESCRIPTION:We take a boat through the many islands in the Stockholm\nArch
ipelago. The final destination is the beautiful village\nof Vaxholm\, whic
h is the only town in the inner Stockholm\narchipelago and therefore known
as its capital. Lunch will\nbe served during the trip.\n\nhttps://indico.
fysik.su.se/event/3987/contributions/4866/
LOCATION:Nordita\, Stockholm Strandvägen\,berth (kajplats) 16
URL:https://indico.fysik.su.se/event/3987/contributions/4866/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Registration
DTSTART;VALUE=DATE-TIME:20140915T064500Z
DTEND;VALUE=DATE-TIME:20140915T073000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4867@indico.fysik.su.se
DESCRIPTION:Speakers: Elizabeth Yang ()\nPerformed by Nordita's secretary
Elizabeth Yang. The\nregistration will continue during the whole week. The
refore\nparticipants which do not reach to be registered during the\nperio
d given here (i. e. 8:45 - 9:30) can do it afterwards\,\nfor instance with
in the lunch time.\n\nhttps://indico.fysik.su.se/event/3987/contributions/
4867/
LOCATION:Nordita\, Stockholm Nordita building number 23
URL:https://indico.fysik.su.se/event/3987/contributions/4867/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Recent Developments and Applications of the Auxiliary-Field Monte
Carlo Method
DTSTART;VALUE=DATE-TIME:20140916T084000Z
DTEND;VALUE=DATE-TIME:20140916T092000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4869@indico.fysik.su.se
DESCRIPTION:Speakers: Christopher Gilbreth ()\nThe auxiliary-field Monte C
arlo (AFMC) method is a powerful\ntechnique to calculate thermal and groun
d-state properties\nof strongly correlated systems. In particular\, it has
been\nextensively applied to study the properties of nuclear and\natomic
systems. We discuss several recent developments and\napplications of the m
ethod to finite-size systems. (i) In\nfinite systems\, it is often necessa
ry to use the canonical\nensemble with fixed number of particles. However\
, the\nprojection on an odd number of particles leads to a new sign\nprobl
em at low temperatures that has severely limited the\napplication of AFMC
to such systems. We discuss a method to\ncircumvent the odd-particle sign
problem which allows\naccurate determination of the ground-state energy\,
and\npresent its application to the calculation of nuclear\npairing gaps f
rom odd-even mass differences [1]. (ii) The\nlevel density is among the m
ost important statistical\nnuclear properties\, but its calculation in the
presence of\ncorrelations is a difficult many-body problem. We discuss\nr
ecent AFMC calculations of level densities in heavy nuclei.\nIn particular
\, we present the first microscopic calculation\nof the collective enhance
ment factors\, which describe the\nenhancement of level densities by colle
ctive states [2].\n(iii) Low-temperature calculations require numerical\ns
tabilization of the long chains of matrix multiplications\nnecessary to co
mpute the propagator\, and a corresponding\nstabilized method for particle
-number projection. The latter\nis computationally expensive. We discuss a
n improved method\nof stabilizing canonical-ensemble calculations that exh
ibits\nbetter scaling and allows calculations for much larger\nsystems [3]
. (iv) Deformation is an important concept for\nthe understanding of heavy
nuclei. However\, it is based on\nmean-field theory\, which breaks rotati
onal invariance\, a\ncornerstone symmetry of finite nuclei. We discuss a m
ethod\nto analyze nuclear deformations at finite temperature using\nAFMC\,
which preserves the rotational invariance of the\nsystem [4]. In particul
ar\, we calculate the probability\ndistribution of the quadrupole operator
in heavy rare-earth\nnuclei\, and show that it carries model-independent\
nsignatures of deformation. References: [1] A. Mukherjee\nand Y. Alhassi
d\, Phys. Rev. Lett. 109\, 032503 (2012). [2] \nC. Ozen\, Y. Alhassid and
H. Nakada\, Phys. Rev. Lett. 110\,\n042502 (2013). [3] C. N. Gilbreth an
d Y. Alhassid\,\narXiv:1402.3585 (2014). [4] Y. Alhassid\, C. N. Gilbreth
and\nG. F. Bertsch\, arXiv:1408.0081 (2014)\n\nhttps://indico.fysik.su.se
/event/3987/contributions/4869/
LOCATION:Nordita\, Stockholm FP41
URL:https://indico.fysik.su.se/event/3987/contributions/4869/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Quantum simulation of two-dimensional U(1) critical systems: A Hig
gs particle and the possible help of string theory for the optical conduct
ivity
DTSTART;VALUE=DATE-TIME:20140916T074000Z
DTEND;VALUE=DATE-TIME:20140916T082000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4875@indico.fysik.su.se
DESCRIPTION:Speakers: Lode Pollet ()\nQuantum simulators are special purpo
se devices designed to\nprovide physical insight in a specific quantum pro
blem that\nis hard to study in the laboratory and impossible on a computer
.\nHowever\, before they can be used they require calibration.\nFor cold a
tomic systems\, quantum Monte Carlo simulations\nhave played a key role th
ere. They established a few years\nago that the thermodynamic properties o
f the experimental\nsystem are in one-to-one agreement with the simulation
s of\nthe corresponding model. The synergy between the two\napproaches has
dramatically progressed since then\, to each\nother’s benefice: In the
main part of this talk\, I will\nfocus on the dynamical properties of a U(
1) critical system\nin (2+1) dimensions focusing on the existence of the\n
amplitude mode or Higgs particle\, and on the optical\nconductivity\, whic
h we compare against predictions from the\nAdS/CFT correspondence. Finally
\, I will discuss some open\nproblems for this approach to quantum simulat
ion.\n\nhttps://indico.fysik.su.se/event/3987/contributions/4875/
LOCATION:Nordita\, Stockholm FP41
URL:https://indico.fysik.su.se/event/3987/contributions/4875/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Low and High-Energy Excitations of the Unitary Fermi Gas
DTSTART;VALUE=DATE-TIME:20140916T070000Z
DTEND;VALUE=DATE-TIME:20140916T074000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4876@indico.fysik.su.se
DESCRIPTION:Speakers: Joseph Carlson ()\nI describe the use of Quantum Mon
te Carlo Methods to study\nlow- and high-energy excitations of the Unitary
Fermi Gas.\nWe have employed Auxiliary Field Quantum Monte Carlo methods\
nto study this regime of strong pairing in the inhomogeneous\ngas. The sca
le invariance of the system places strong\nconstraints on the form of the
density functional\, unlike\nnuclear density functionals it can be\ndescri
bed in only a very few constants. The derived functional\ncan then be use
d to predict the properties of small trapped\nclusters\, we find excellent
agreement between microscopic\ncalculations of these clusters and results
predicted by the\ndensity functional. We have also studied the response o
f the\nunitary Fermi Gas at very large momentum transfer.\nExperimentally\
, the spin and density response are quite\ndifferent even at very high mom
entum. We describe approaches\nto reproduce these responses and analogies
to neutrino\nscattering in nuclei.\n\nhttps://indico.fysik.su.se/event/398
7/contributions/4876/
LOCATION:Nordita\, Stockholm FP41
URL:https://indico.fysik.su.se/event/3987/contributions/4876/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Morning Session: Density Functional Theories: Formalism and Appli
cations
DTSTART;VALUE=DATE-TIME:20140923T073000Z
DTEND;VALUE=DATE-TIME:20140923T093000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4878@indico.fysik.su.se
DESCRIPTION:Speakers: Shan-Gui Zhou ()\nMulti-Dimensionally Constrained Co
variant Density Functional\nTheories: Formalism and Applications\n\nMany d
ifferent shape degrees of freedom play crucial roles\nin determining the n
uclear ground state and saddle point\nproperties and the fission path. For
the study of nuclear\npotential energy surfaces\, it is desirable to have
\nmicroscopic and self-consistent models in which all known\nimportant sha
pe degrees of freedom are included. By breaking\nboth the axial and the sp
atial reflection symmetries\nsimultaneously\, we develop multi-dimensional
ly constrained\ncovariant density \nfunctional theories (MDC-CDFTs) [1-3].
The nuclear shape is\nassumed to be invariant under the reversion of x an
d y axes\,\ni.e.\, the intrinsic symmetry group is V_4 and all shape\ndegr
ees of freedom \\beta_{\\lambda\\mu} with even \\mu\, such as\n\\beta_{20}
\, \\beta_{22}\, \\beta_{30}\, \\beta_{32}\, \\beta_{40}\,\n...\, are incl
uded self-consistently. The single-particle\nwave functions are expanded i
n an axially deformed harmonic\noscillator (ADHO) basis. The functional ca
n be one of the\nfollowing four forms: the meson exchange or point-couplin
g\nnucleon interactions combined with the nonlinear or\ndensity-dependent
couplings. The pairing effects are taken\ninto account with either the BCS
approach in MDC\nrelativistic mean field (MDC-RMF) models [1\,2] or the\n
Bogoliubov transformation in MDC relativistic\nHartree-Bogoliubov (MDC-RHB
) models [3]. In this talk I will\npresent the formalism of the MDC-CDFT's
and the applications\nto the study of fission barriers and third minima i
n\npotential energy surfaces of actinide nuclei [1\,2\,4]\, the\nY_{32} co
rrelations in \nN=150 isotones and Zr isotopes [5\,6]\, and shape of\nhype
rnuclei [7\,8]. \n[1] B. N. Lu\, E. G. Zhao\, and S. G. Zhou\, Phys. Rev.
C85\n(2012) 011301(R). \n[2] B. N. Lu\, J. Zhao\, E. G. Zhao\, and S. G. Z
hou\, Phys.\nRev. C89 (2014) 014323.\n[3] B. N. Lu\, et al.\, in preparati
on. \n[4] J. Zhao\, B. N. Lu\, E. G. Zhao\, and S. G. Zhou\, Phys.\nRev. C
86 (2012) 057304. \n[5] J. Zhao\, B. N. Lu\, D. Vretenar\, E. G. Zhao\, an
d S. G.\nZhou\, arXiv:1404.5466 \n[nucl-th]. \n[6] J. Zhao\, et al.\, in p
reparation. \n[7] B. N. Lu\, E. G. Zhao\, and S. G. Zhou\, Phys. Rev. C84\
n(2011) 014328. \n[8] B. N. Lu\, E. Hiyama\, H. Sagawa\, and S. G. Zhou\,
Phys.\nRev. C84 (2014) 044307.\nDensity Functional Theories: Formalism and
Applications\n\nhttps://indico.fysik.su.se/event/3987/contributions/4878/
LOCATION:Nordita\, Stockholm 132:028
URL:https://indico.fysik.su.se/event/3987/contributions/4878/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Afternoon Session: Metallic grains
DTSTART;VALUE=DATE-TIME:20140922T123000Z
DTEND;VALUE=DATE-TIME:20140922T143000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4879@indico.fysik.su.se
DESCRIPTION:Speakers: Yoram Alhassid ()\nChair: Alexander Balatsky\n\nhttp
s://indico.fysik.su.se/event/3987/contributions/4879/
LOCATION:Nordita\, Stockholm 132:028
URL:https://indico.fysik.su.se/event/3987/contributions/4879/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Morning Session: BSC-BEC
DTSTART;VALUE=DATE-TIME:20140922T074500Z
DTEND;VALUE=DATE-TIME:20140922T094500Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4880@indico.fysik.su.se
DESCRIPTION:Speakers: Giancarlo Calvanese-Strinati ()\nTemperature depende
nce of the pair coherence and healing\nlengths for a fermionic superfluid
throughout the BCS-BEC\ncrossover\n\nThe pair correlation function and the
order parameter\ncorrelation function probe\, respectively\, the intra-pa
ir and\ninter-pair correlations of a Fermi gas with attractive\ninter-part
icle interaction. Here\, these correlation\nfunctions are\ncalculated in t
erms of a diagrammatic approach\, as a\nfunction of coupling throughout th
e BCS-BEC crossover and of\ntemperature\, both in the superfluid and norma
l phase across\nthe critical temperature $T_{c}$. Several physical\nquanti
ties are obtained from this calculation\, including the\npair coherence an
d healing lengths\, the Tan's contact\, the\ncrossover temperature $T^{*}$
below which inter-pair\ncorrelations begin to build up in the normal phas
e\, and the\nsignature for the disappearance of the underlying Fermi\nsurf
ace which tends to survive in spite of pairing\ncorrelations. A connection
is also established with\nexperimental data on the temperature dependence
of the\nnormal coherence length as extracted from the proximity\neffect m
easured in high-temperature (cuprate) superconductors.\n\nhttps://indico.f
ysik.su.se/event/3987/contributions/4880/
LOCATION:Nordita\, Stockholm 132:028
URL:https://indico.fysik.su.se/event/3987/contributions/4880/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Nuclear- and particle-physics aspects of condensed-matter nanosyst
ems
DTSTART;VALUE=DATE-TIME:20140915T123000Z
DTEND;VALUE=DATE-TIME:20140915T131000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4881@indico.fysik.su.se
DESCRIPTION:Speakers: Constantine Yannouleas ()\nThe physics of condensed-
matter nanosystems exhibits\nremarkable analogies with atomic nuclei. Exam
ples are:\nPlasmons corresponding to Giant resonances [1]\, electronic\nsh
ells\, de- formed shapes\, and fission [2]\, beta-type decay\,\nstrongly c
orrelated phenomena associated with symmetry\nbreaking and symmetry restor
ation [3]\, etc. Most recently\,\nanalogies with relativistic quantum-fiel
d theories (RQFT) and \nhigh-energy particle physics are beeing explored i
n the\nfield of graphene nanostructures [4]. The talk will review\nthese a
nalogies focusing in particular on the following\nthree aspects:\n(1) The
shell-correction method (SCM\, commonly known as\nStrutinsky’s averaging
method and introduced in the 1960’s\nin nuclear physics) was formulated
[5] in the context of\ndensity functional theory (DFT). Applications of t
he DFT-SCM\n(and of a semiempirical variant\, SE-SCM\, closer to the\nnucl
ear Strutinsky approach) to condensed-matter finite\nsystems will be discu
ssed\, including the charging and\nfragmentation of metal clusters\, fulle
renes\, and metallic \nnanowires [5]. The DFT-SCM offers an improvement co
mpared to\nthe use of Thomas-Fermi gradient expansions for the kinetic\nen
ergy density functional in the framework of \norbital-free DFT.\n(2) A uni
fied description of strongly correlated phenomena\nin finite systems of re
pelling particles [whether electrons\nin quantum dots (QDs) or ultracold b
osons in rotating traps]\nhas been achieved through a two-step method of s
ymmetry\nbreaking at the unrestricted Hartree- Fock (UHF) level and\nof su
bsequent symmetry restoration via post Hartree-Fock\nprojection techniques
[3]. The general principles of the\ntwo-step method can be traced to nucl
ear theory (Peierls and\nYoccoz) and quantum chemistry (L ̈owdin). This m
ethod can\ndescribe a wide variety of novel strongly correlated\nphenomena
\, including:\n(I) Chemical bonding and dissociation in quantum dot\nmolec
ules and in single elliptic QDs\, with potential\ntechnological applicatio
ns to solid-state quantum computing.\n(II) Particle localization at the ve
rtices of concentric\npolygonal rings and formation of rotating (and other
less\nsymmetric) Wigner molecules in quantum dots and ultracold\nrotating
bosonic clouds [6].\n(III) At high magnetic field (electrons) or rapid ro
tation\n(neutral bosons)\, the method yields analytic trial wave\nfunction
s in the lowest Landau level [7]\, which are an \nalternative to the fract
ional-quantum-Hall-effect (FQHE)\ncomposite-fermion and Jastrow-Laughlin a
pproaches.\n(3) The physics of planar graphene nanorings with armchair\ned
ge terminations shows analo- gies with the physics\ndescribed by the RQFT
Jackiw-Rebbi model and the related \nSu-Schrieffer- Heeger model of polyac
etylene [4]. This part\nof the talk will describe the emergence of exotic
states and\nproperties\, like solitons\, charge fractionization\, and\nnon
trivial topological insulators\, in these graphene\nnanosystems.\n[1] C. Y
annouleas\, R.A. Broglia\, M. Brack\, and P.F.\nBortignon\, Phys. Rev. Let
t. 63\, 255 (1989)\; [2] C.\nYannouleas\, U. Landman\, and R.N. Barnett\,
in Metal Clusters\,\nedited by \nW. Ekardt (John-Wiley\, New York\, 1999)
Ch. 4\, p. 145\; [3] C.\nYannouleas and U. Landman\, Rep. Prog. Phys. 70\,
2067 (2007)\,\nand references therein\; [4] I. Romanovsky\, C. Yannouleas
\,\nand U. Landman\, Phys. Rev. B 87\, 165431 (2013)\; Phys. Rev. B\n89\,
035432 (2014). [5] C. Yannouleas and U. Landman\, Phys.\nRev. B 48\, 8376
(1993)\; Ch. 7 in ”Recent Advances in\nOrbital-Free Density Functional T
heory\,” Y.A. Wang and T.A.\nWesolowski Eds. (Word Scientific\, Singapor
e\, 2013) p. 203\n(arXiv:1004.3536)\; [6] C. Yannouleas and U. Landman\, P
hys.\nRev. Lett. 82\, 5325 (1999)\; I. Romanovsky\, C. Yannouleas\,\nand U
. Landman\, Phys. Rev. Lett. 97\, 090401 (2006). [7] C.\nYannouleas and U.
Landman\, Phys. Rev. A 81\, 023609 (2010)\;\nPhys. Rev. B 84\, 165327 (20
11).\n\nhttps://indico.fysik.su.se/event/3987/contributions/4881/
LOCATION:Nordita\, Stockholm FP41
URL:https://indico.fysik.su.se/event/3987/contributions/4881/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Afternoon Session: Modern approaches to nuclear structure
DTSTART;VALUE=DATE-TIME:20140923T123000Z
DTEND;VALUE=DATE-TIME:20140923T143000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4885@indico.fysik.su.se
DESCRIPTION:Speakers: Andrea Idini ()\, Toshio Suzuki ()\nT. Suzuki\nNucle
ar shell structure\, nuclear forces and nuclear weak\nprocesses\n\nShell-m
odel study of spin modes in nuclei have been done\nwith new shell-model Ha
miltonians which have proper tensor\ncomponents\, and applied to nuclear w
eak processes at stellar\nenvironments. Roles of nuclear forces\, especial
ly the tensor\nand three-body interactions\, on nuclear structure and shel
l\nevolutions are investigated. New shell-model Hamiltonians\nfor p-shell
(SFO [1]) and pf-shell (GXPF1[2]) and VMU\n(monopole-based universal inter
action) [3]\, are found to\ndescribe spin-dependent modes in nuclei very w
ell such as\nGamow-Teller (GT) strength in 12C [1]\, 40Ar [4]\, 56Fe and\n
56Ni [5] and magnetic moments of p-shell nuclei [1\,6]\, as \nwell as shel
l evolutions toward drip-lines [3\,7]. We discuss\nsome of the following t
opics on nuclear weak processes at\nstellar environments with the use of t
he new transition\nstrengths: \n(1) New neutrino-nucleus reaction cross s
ections on light\nnuclei are used to study light-element nucleosynthesis i
n\nsupernova explosions [8]\, and the production yield ratio for\n11B/7LI
is pointed out to be useful to determine the\nneutrino-mass hierarchy [9].
\n(2) New neutrino-induced cross sections are obtained for 13C\n[10] and
40Ar [4]\, which are useful targets for detection of\nsolar and supernova
neutrinos. \n(3) New electron-capture rates in Ni isotopes [11] are\nobtai
ned with GXPF1 and implications on element synthesis\nare studied. \n(4) E
-capture and beta-decay rates in sd-shell are used to\nstudy nuclear URCA
processes in O-Ne-Mg core stars [12]. \nRoles of the three-body forces\, e
specially the\nFujita-Miyazawa force\, on proper shell evolutions of\nneut
ron-rich isotopes [13]\, as well as on the closed-shell\nnature of 48Ca
and M1 transition in 48Ca are also studied on\ntop of the two-body G-matri
x obtained by including\ncore-polarization effects in larger spaces.\n1. T
. Suzuki\, R. Fujimoto and T. Otsuka\, Phys. Rev. C 67\,\n044302 (2003).\n
2. M. Honma et al.\, Phys. Rev. C 65\, 061301(R) (2002)\; 69\,\n034335 (20
04).\n3. T. Otsuka\, T. Suzuki\, H. Honma\, Y. Utsuno\, N. Tsunoda\, K.\nT
sukiyama and M. Hjorth-Jensen\, Phys. Rev. Lett. 104\, 012501\n(2010).\n4.
T. Suzuki and M. Honma\, Phys. Rev. C 87\, 014607 (2013).\n5. T. Suzuki e
t al.\, Phys. Rev. C 79\, 061603 (2009).\n6. C. Yuan\, T. Suzuki\, T. Otsu
ka\, F. Xu and N. Tsunoda\,\nPhys. Rev. C 85\, 064324 (2012).\n7. T. Otsuk
a\, T. Suzuki\, R. Fujimoto\, H. Grawe\, and Y.\nAkaishi\, Phys. Rev. Lett
. 95\, 232502 (2005).\n8. T. Suzuki et al.\, Phys. Rev. C 74\, 034307 (200
6).\n9. T. Suzuki and T. Kajino\, J. Phys. G: Nucl. Part. Phys.\n40\, 0831
01 (2013).\n10. T. Suzuki\, A. B. Balantekin and T. Kajino\, Phys. Rev. C\
n86\, 015502 (2012).\n11. T. Suzuki\, M. Honma\, H. Mao\, T. Otsuka and T.
Kajino\,\nPhys. Rev. C 83\, 044619 (2011).\n12. H. Toki\, T. Suzuk\, K. N
omoto\, S. Jones and R. Hirschi\,\nPhys. Rev. C 88\, 015806 (2013)\; S. Jo
nes et al.\, Astrophys.\nJ. 772\, 150 (2913).\n13. T. Otsuka\, T. Suzuki\,
J. D. Holt\, A. Schwenk\, and Y.\nAkaishi\, Phys. Rev. Lett.105\, 032501
(2010)\; J. D. Holt\, T.\nOtsuka\, A. Schwenk and T. Suzuki\, J. Phys. G
39\, 085111 (2012).\n-----------------------------------------------------
----------------\nA. Idini\nNuclear Field Theory\, Shell Model\, Nuclear R
eactions and\nNuclear Astrophysics\n\nMean field\, independent particles\,
picture is the starting\npoint of our understanding of the nuclear many-b
ody system.\nMany development across those lines in terms of treatment\nan
d effecting interaction\, culminating in the last EDF\nefforts\, enable us
to study globally\, across the whole\nnuclear chart\, the bulk properties
of nuclei. However\nincluding more complex nuclear correlations\, is cust
omary to\nexploit the \nrichness of nuclear structure in the related field
s of\nnuclear reactions and astrophysics shedding light on\nspecific\, imp
ortant cases and open problems like the origin\nof pairing in nuclei or th
e importance of forbidden decays\nin astrophysical processes. This can be
achieved in terms of\nincluding correlation starting from a mean field\, a
nd then\nconsidering the interweaving of collective and single\nparticle d
egrees of freedom (Nuclear Field Theory)\, which\ngives a reasonable estim
ate over several type of nuclear\nstructure observables\, remarking the du
al origin of nuclear\npairing \nand enabling a quantitative account of dir
ect nuclear\nreaction's absolute cross sections.\nFrom another point of vi
ew\, considering the contributions of\nthe possible configurations\, effec
tively interacting in a\ndefined valence space (Shell Model)\, gives a pre
cise\nestimate of ground and low-lying states. This is of outmost\nimporta
nce in \norder to estimate quantities related to beta decay and\nelectron
capture\, key in several astrophysical process\, thus\nproviding important
insight to nuclear astrophysics.\n* A. Idini et al.\, Dual Origin of Pair
ing in Nuclei\,\nhttp://arxiv.org/abs/1404.7365\n* G. Potel et al.\, Coope
r pair transfer in nuclei\, RPP 76\,\n106301. \nhttp://iopscience.iop.org/
0034-4885/76/10/106301\n* A. Idini et al.\, Quasiparticle renormalization
and pairing\ncorrelations in spherical superfluid nuclei\, PRC 85\, 014331
. \nhttp://journals.aps.org/prc/abstract/10.110 /PhysRevC.85.014331\n\nhtt
ps://indico.fysik.su.se/event/3987/contributions/4885/
LOCATION:Nordita\, Stockholm 132:028
URL:https://indico.fysik.su.se/event/3987/contributions/4885/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Morning Session: Variational Theories in Quantum Chemistry
DTSTART;VALUE=DATE-TIME:20140925T073000Z
DTEND;VALUE=DATE-TIME:20140925T093000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4940@indico.fysik.su.se
DESCRIPTION:Speakers: Paul Ayers ()\nChair: Jorge Dukelsky\n\nhttps://indi
co.fysik.su.se/event/3987/contributions/4940/
LOCATION:Nordita\, Stockholm 132:028
URL:https://indico.fysik.su.se/event/3987/contributions/4940/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Afternoon Session: Explosive Nucleosynthesis of heavy elements
DTSTART;VALUE=DATE-TIME:20141001T123000Z
DTEND;VALUE=DATE-TIME:20141001T143000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4941@indico.fysik.su.se
DESCRIPTION:Speakers: Gabriel Martinez Pinedo ()\nhttps://indico.fysik.su.
se/event/3987/contributions/4941/
LOCATION:Nordita\, Stockholm 132:028
URL:https://indico.fysik.su.se/event/3987/contributions/4941/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Afternoon Session: Coupled Cluster Theories
DTSTART;VALUE=DATE-TIME:20140925T123000Z
DTEND;VALUE=DATE-TIME:20140925T143000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4889@indico.fysik.su.se
DESCRIPTION:Speakers: Thomas Duguet ()\nChair: Gustavo Scuseria\n\nhttps:/
/indico.fysik.su.se/event/3987/contributions/4889/
LOCATION:Nordita\, Stockholm 132:028
URL:https://indico.fysik.su.se/event/3987/contributions/4889/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Afternoon Session: Exotic nuclei. Bosonic embedded gaussian ensemb
les
DTSTART;VALUE=DATE-TIME:20141006T123000Z
DTEND;VALUE=DATE-TIME:20141006T143000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4890@indico.fysik.su.se
DESCRIPTION:Speakers: Hugo Adrian Ortega ()\, Jason Holt ()\nJason Holt\nN
uclear forces and exotic nuclei. \n\nWithin the context of valence-space H
amiltonians derived\nfrom different ab initio many-body methods\, I will d
iscuss\nthe importance of 3N forces in understanding and making new\ndisco
veries in two of the most exciting regions of the\nnuclear chart: exotic o
xygen and calcium isotopes. Beginning\nin oxygen\, we find that the effect
s of 3N forces are\ndecisive in explaining why 24O is the last bound oxyge
n\nisotope [1\,2].\nFurthermore\, 3N forces play a key role in reproducing
\nspectra\, including signatures of doubly magic 22\,24O\, as\nwell as pro
perties of isotopes beyond the dripline. The\ncalcium isotopes\, with pote
ntially three new magic numbers\nbeyond the standard N=20\,28\, present a
unique laboratory to\nstudy the evolution of shell structure in medium-mas
s\nnuclei. From the viewpoint of two-neutron separation\nenergies and spec
troscopic signatures of doubly-magic\nsystems\, I emphasize the impact of
3N forces in reproducing\nthe N=28 magic number in 48Ca and in predicting
properties\nof 50-56Ca\, which indicate new N=32\,34 magic numbers.\nFinal
ly\, I will highlight new efforts to quantify theoretical\nuncertainties i
n ab initio calculations of medium-mass\nnuclei by exploring resolution-sc
ale dependence of\nobservables in sd-shell isotopic/isotonic chains.\n----
-----------------------------------------------------------------\nAdrian
Ortega\nEigenvalue and eigenvector statistics for bosonic embedded\ngaussi
an ensembles\n\nWithin the framework in Random Matrix Theory (RMT)\, there
\nexists the Bosonic Embedded Gaussian Ensembles. In the last\nfew years\,
there has been a renewed interest in such\nensembles. These ensembles dis
play different eigenvalue and\neigenvector correlations compared against t
he canonical\nensembles of RMT. I shall describe briefly these bosonic\nen
sembles when the single-particle states are two. Novel\nresults will be pr
esented for three single-particle states.\nIn this framework\, I shall des
cribe also some numerical\nexperiments on a variation of the Bose-Hubbard
model\, namely\nthe Random Bose-Hubbard model. Another ongoing interesting
\nproject is the study of quantum dynamics in disordered\nnetworks\, and t
he roles that play the particle correlations\nthat benefits the transition
probability between two\nocupation-number states.\n\nhttps://indico.fysik
.su.se/event/3987/contributions/4890/
LOCATION:Nordita\, Stockholm 132:028
URL:https://indico.fysik.su.se/event/3987/contributions/4890/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Discussion
DTSTART;VALUE=DATE-TIME:20140915T102000Z
DTEND;VALUE=DATE-TIME:20140915T110000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4891@indico.fysik.su.se
DESCRIPTION:https://indico.fysik.su.se/event/3987/contributions/4891/
LOCATION:Nordita\, Stockholm FP41
URL:https://indico.fysik.su.se/event/3987/contributions/4891/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Neutrino-nucleus scattering and supernova neutrinos
DTSTART;VALUE=DATE-TIME:20141007T134000Z
DTEND;VALUE=DATE-TIME:20141007T142000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4892@indico.fysik.su.se
DESCRIPTION:Speakers: Emanuel A. Ydrefors ()\nNeutrinos from core-collapse
supernovae constitute valuable\nprobes of both neutrino properties and of
the currently\nunknown supernova mechanisms. Supernova neutrinos can be\n
detected by using charged-current and/or neutral-current\nneutrino scatter
ings off nuclei. Theoretical estimates of\nthe nuclear responses for relev
ant nuclei are important for\nthe interpretation of future experimental re
sults. The\ncalculation of neutrino-nucleus cross sections constitute\ncha
llenges both from the computational and theoretical\npoints of view.\nIn t
his talk the challenges related to computations of\nneutrino cross section
s will be discussed. Recent results of\ncalculated nuclear responses for n
uclei which are relevant\nfor future neutrino experiments will also be pre
sented.\n\nhttps://indico.fysik.su.se/event/3987/contributions/4892/
LOCATION:Nordita\, Stockholm 132:028
URL:https://indico.fysik.su.se/event/3987/contributions/4892/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Combined ab initio-mean field approach to solute-atom diffusion in
alloys.
DTSTART;VALUE=DATE-TIME:20141007T093000Z
DTEND;VALUE=DATE-TIME:20141007T101000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4893@indico.fysik.su.se
DESCRIPTION:Speakers: Luca Messina ()\nSolute diffusion in alloys is mostl
y mediated by\ndefect-driven mechanisms. In irradiated materials\, the\nco
nsiderably large point-defect population may enhance or\neven induce solut
e diffusion. In particular\, in case of a\nbinding solute-defect interacti
on\, kinetic correlation\neffects may arise and lead to the formation of n
anoscopic\nsolute-defect complexes. The latter may be detrimental for\nthe
alloy structural integrity. In this talk we present a\nnovel method for p
redicting the arising of solute-defect\nflux coupling in most types of all
oys. The model combines\nfirst-principles calculations with an analytical
mean field\nmodel and allows for the computation of solute transport and\n
diffusion coefficients at low temperatures\, which are\nusually inaccessib
le by means of experiments. The results\nfor model dilute alloys will be p
resented\, and implications\non the structural integrity of nuclear reacto
r pressure\nvessel steels will be discussed.\n\nhttps://indico.fysik.su.se
/event/3987/contributions/4893/
LOCATION:Nordita\, Stockholm 132:028
URL:https://indico.fysik.su.se/event/3987/contributions/4893/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Morning Session: Quantum speed limits and optimal Hamiltonians for
driven systems in mixed states
DTSTART;VALUE=DATE-TIME:20141010T073000Z
DTEND;VALUE=DATE-TIME:20141010T093000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4894@indico.fysik.su.se
DESCRIPTION:Speakers: Hoshang Heydari ()\nhttps://indico.fysik.su.se/event
/3987/contributions/4894/
LOCATION:Nordita\, Stockholm 132:028
URL:https://indico.fysik.su.se/event/3987/contributions/4894/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Quantum tensor networks for simulating quantum spin systems
DTSTART;VALUE=DATE-TIME:20140919T070000Z
DTEND;VALUE=DATE-TIME:20140919T074000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4963@indico.fysik.su.se
DESCRIPTION:Speakers: Frank Verstraete ()\nhttps://indico.fysik.su.se/even
t/3987/contributions/4963/
LOCATION:Nordita\, Stockholm FP41
URL:https://indico.fysik.su.se/event/3987/contributions/4963/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Afternoon Session: Hall viscosity of hierarchical quantum Hall sta
tes.
DTSTART;VALUE=DATE-TIME:20141009T123000Z
DTEND;VALUE=DATE-TIME:20141009T143000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4895@indico.fysik.su.se
DESCRIPTION:Speakers: Mikael Fremling ()\nUsing methods based on conformal
field theory\, we construct\nmodel wave functions on a torus with arbitra
ry flat metric\nfor all chiral states in the abelian quantum Hall hierarch
y.\nThese functions have no variational parameters\, and they\ntransform u
nder the modular group in the same way as the\nmulticomponent generalizati
ons of the Laughlin wave\nfunctions. Assuming the absence of Berry phases
upon\nadiabatic variations of the modular parameter $\\tau$\, we\ncalculat
e the quantum Hall viscosity and find it to be in\nagreement with the form
ula\, given by Read\, which relates the\nviscosity to the average orbital
spin of the electrons. For\nthe filling factor $\\nu=2/5$ Jain state\, whi
ch is at the\nsecond level in the hierarchy\, we compare our model wave\nf
unction with the numerically obtained ground state of the\nCoulomb interac
tion Hamiltonian in the lowest Landau level\,\nand find very good agreemen
t in a large region of the\ncomplex $\\tau$ plane. For the same example\,
we also\nnumerically compute the Hall viscosity and find good\nagreement w
ith the analytical\nresult for both the model wave function and the numeri
cally\nobtained Coulomb wave function. We argue that this supports\nthe no
tion of a generalized plasma analogy that would ensure\nthat wave function
s obtained using the conformal field\ntheory methods do not acquire Berry
phases upon adiabatic\nevolution.\n\nhttps://indico.fysik.su.se/event/3987
/contributions/4895/
LOCATION:Nordita\, Stockholm 132:028
URL:https://indico.fysik.su.se/event/3987/contributions/4895/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Welcome address
DTSTART;VALUE=DATE-TIME:20140922T073000Z
DTEND;VALUE=DATE-TIME:20140922T074500Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4896@indico.fysik.su.se
DESCRIPTION:Speakers: Alexander Balatsky ()\, Ramon Wyss ()\nAlexander Bal
atsky is one of the four Professors at Nordita.\nHe is in Condensed Matter
Physics.\n---------------------------------------------------------------
------\nRamon Wyss is Professor at the Royal Institute of Technology\n(KTH
) and Vice President of International Affairs there.\n\nhttps://indico.fys
ik.su.se/event/3987/contributions/4896/
LOCATION:Nordita\, Stockholm 132:028
URL:https://indico.fysik.su.se/event/3987/contributions/4896/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Afternoon Session: The Many-body localization transition
DTSTART;VALUE=DATE-TIME:20141010T123000Z
DTEND;VALUE=DATE-TIME:20141010T143000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4897@indico.fysik.su.se
DESCRIPTION:Speakers: Jonas Kjäll ()\nMany-body localization is closely c
onnected to some\nfundamental questions of quantum mechanics\, like how an
d why\nquantum systems thermalize. It can protect quantum order at\nelevat
ed temperatures and can potentially be important in\nthe development of qu
antum memories. Many-body localization\noccurs in isolated quantum systems
when Anderson\nlocalization persists in the presence of finite\ninteracti
ons. Despite strong evidence for the existence of a\nmany-body localizatio
n transition a reliable extraction of\nthe critical disorder strength has
been difficult due to a\nlarge drift with system size in the studied quant
ities. In\nthis talk I describe the challenges involved in this problem\na
nd explain our approaches\, based on entanglement entropy\,\nto understand
it: (i) the variance of the half-chain\nentanglement entropy of exact eig
enstates and (ii) the long\ntime change in entanglement after a local quen
ch from an\nexact eigenstate. With this we can estimate the critical\ndiso
rder strength and its energy dependence. We investigate\nthese quantities
in a disordered quantum Ising chain that\nalso has disorder protected quan
tum order at large disorder\nstrength and provide evidence for it being a
separate\ntransition.\n\nhttps://indico.fysik.su.se/event/3987/contributio
ns/4897/
LOCATION:Nordita\, Stockholm 132:028
URL:https://indico.fysik.su.se/event/3987/contributions/4897/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Program Dinner
DTSTART;VALUE=DATE-TIME:20140930T173000Z
DTEND;VALUE=DATE-TIME:20140930T203000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4899@indico.fysik.su.se
DESCRIPTION:https://indico.fysik.su.se/event/3987/contributions/4899/
LOCATION:- Berns Bistro and Bar\, Berzelii Park\, Näckströmsgatan 8
URL:https://indico.fysik.su.se/event/3987/contributions/4899/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Coffe break
DTSTART;VALUE=DATE-TIME:20140919T135000Z
DTEND;VALUE=DATE-TIME:20140919T141000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4900@indico.fysik.su.se
DESCRIPTION:https://indico.fysik.su.se/event/3987/contributions/4900/
LOCATION:Nordita\, Stockholm FP41
URL:https://indico.fysik.su.se/event/3987/contributions/4900/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Summary
DTSTART;VALUE=DATE-TIME:20140919T141000Z
DTEND;VALUE=DATE-TIME:20140919T145000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4901@indico.fysik.su.se
DESCRIPTION:Speakers: Yoram Alhassid ()\nhttps://indico.fysik.su.se/event/
3987/contributions/4901/
LOCATION:Nordita\, Stockholm FP41
URL:https://indico.fysik.su.se/event/3987/contributions/4901/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Welcome address
DTSTART;VALUE=DATE-TIME:20140915T073000Z
DTEND;VALUE=DATE-TIME:20140915T080000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4904@indico.fysik.su.se
DESCRIPTION:Speakers: Axel Brandenburg ()\nProf. Axel Brandenburg is a mem
ber of the Board and Deputy\nDirector of Nordita.\n\nhttps://indico.fysik.
su.se/event/3987/contributions/4904/
LOCATION:Nordita\, Stockholm FP41
URL:https://indico.fysik.su.se/event/3987/contributions/4904/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Defects in Nuclear Pasta
DTSTART;VALUE=DATE-TIME:20140915T080000Z
DTEND;VALUE=DATE-TIME:20140915T084000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4905@indico.fysik.su.se
DESCRIPTION:Speakers: Charles Horowitz ()\nDense nuclear matter\, near the
base of the crust in neutron\nstars\, is expected to have complex nuclear
pasta shapes\nbecause of coulomb frustration. Competition between\nshor
t-range nuclear attraction and long-range coulomb\nrepulsion insures that
many different shapes have very\nsimilar energies. We report large-scale
molecular dynamics\nsimulations of nuclear pasta and find long-lived topol
ogical\ndefects. These defects could increase electron pasta\nscattering
and reduce the electrical and thermal\nconductivities. A reduced thermal c
onductivity may be\nvisible in X-ray observations of neutron star crust co
oling.\nA reduced electrical conductivity could lead to the decay\nof magn
etic fields.\n\nhttps://indico.fysik.su.se/event/3987/contributions/4905/
LOCATION:Nordita\, Stockholm FP41
URL:https://indico.fysik.su.se/event/3987/contributions/4905/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Angular-momentum-projection method to approach nuclear many-body w
ave functions
DTSTART;VALUE=DATE-TIME:20140915T131000Z
DTEND;VALUE=DATE-TIME:20140915T135000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4914@indico.fysik.su.se
DESCRIPTION:Speakers: Yang Sun ()\nIn performing shell-model calculations
for large nuclear\nsystems\, the central issue is how to truncate the\nshe
ll-model space efficiently. It corresponds to a proper\narrangement of the
configuration space to separate the most\nimportant part from the rest of
the space. There are\ndifferent schemes for the shell-model truncation.\n
Considering the fact that most nuclei in the nuclear chart\nare deformed\,
using a deformed basis supplemented by angular\nmomentum projection is an
efficient way. Shell-model\nHamiltonian is then diagonalized in the proje
cted basis. The\nmethod is in principle independent of how a deformed basi
s\nis prepared and how an effective interaction is chosen.\nThis approach
may be viewed as to bridge the two traditional\nnuclear physics methods: t
he deformed mean-field\napproximation and the conventional shell-model\ndi
agonalization\, because it keeps all the advantages that a\nmean-field mod
el has to incorporate important correlations\,\nand has the properties of
the conventional shell-model that\nconfigurations are mixed beyond the mea
n-filed states to\ninclude effects of residual interactions. \nIn this tal
k\, we present the above idea by taking the\nProjected Shell Model and its
extensions as examples\n[1\,2\,3\,4]. Given the strong demand for shell m
odel\ncalculations also from nuclear astrophysics\, one needs such\nan app
roach that contains sufficient correlations and can\ngenerate wave functio
ns in the laboratory frame\, thus\nallowing exact calculations for transit
ion probabilities\,\nspectroscopic factors\, and beta-decay and electron-c
apture\nrates\, in heavy\, deformed nuclei.\n This research is supported b
y the National Natural Science\nFoundation of China (No. 11135005) and by
the 973 Program of\nChina (No. 2013CB834401).\n[1] K. Hara\, Y. Sun\, Int.
J. Mod. Phys. E4 (1995) 637. \n[2] Y. Sun and C.-L. Wu\, Phys. Rev. C68 (
2003) 024315.\n[3] Y. Sun\, Int. J. Mod. Phys. E15 (2006) 1695.\n[4] Y. Su
n\, Rev. Mex. Fis. S54(3) (2008) 122.\n\nhttps://indico.fysik.su.se/event/
3987/contributions/4914/
LOCATION:Nordita\, Stockholm FP41
URL:https://indico.fysik.su.se/event/3987/contributions/4914/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Neutrino physics and nuclear structure for double-beta decay
DTSTART;VALUE=DATE-TIME:20140917T141000Z
DTEND;VALUE=DATE-TIME:20140917T145000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4915@indico.fysik.su.se
DESCRIPTION:Speakers: Mihai Horoi ()\nNeutrinoless double-beta decay\, if
observed\, would signal\nphysics beyond the Standard Model that would be d
iscovered\nat energies significantly lower than those at which the\nreleva
nt degrees of freedom can be excited. Therefore\, it\ncould be difficult t
o use the neutrinoless double-beta decay\nobservations to distinguish betw
een several beyond Standard\nModel competing mechanisms that were propose
to explain this\nprocess. Accurate nuclear structure calculations of the\n
nuclear matrix elements (NME) necessary to analyze the decay\nrates could
be helpful to narrow down the list of competing\nmechanisms\, and to bette
r identify the more exotic\nproperties of the neutrinos. In my talk I will
review the\nneutrino physics relevant for double-beta decay\, I will\nana
lyze the status of the shell model calculation of the\nNME\, and their rel
evance for discriminating thecontribution\nof possible competing mechanism
s to the neutrinoless\ndouble-beta decay process.\nU.S. DoE grant DE-SC000
8529 and U.S. NSF grants PHY-1068217\nand PHY-1404442 are acknowledged.\n\
nhttps://indico.fysik.su.se/event/3987/contributions/4915/
LOCATION:Nordita\, Stockholm FP41
URL:https://indico.fysik.su.se/event/3987/contributions/4915/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Microscopic description of nuclear reactions within Coupled Cluste
r and Gamow Shell Model theories
DTSTART;VALUE=DATE-TIME:20140915T141000Z
DTEND;VALUE=DATE-TIME:20140915T145000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4916@indico.fysik.su.se
DESCRIPTION:Speakers: Nicolas Michel ()\nNuclei at drip-lines bear unique
properties such as halos or\nresonant character at ground state level\, in
existent in the\nvalley of stability. While the latter consists of standar
d\nclosed quantum systems\, drip-line nuclei are open quantum\nsystems\, s
o that models describing their properties must\ninclude both nuclear inter
-correlations and continuum\ndegrees of freedom. Coupled Cluster and Gamow
Shell Model\ntheories\, in both ab-initio and effective approaches\, are\
ntools of choice for that matter as nuclear correlations are\npresent thro
ugh configuration mixing while continuum degrees\nof freedom are imparted
by the use of the Berggren basis.\nThe latter methods\, initially devised
for structure\ncalculations\, can now be utilized to study reaction\nobser
vables. Applications concern direct reactions on light\nand medium nuclei.
\n\nhttps://indico.fysik.su.se/event/3987/contributions/4916/
LOCATION:Nordita\, Stockholm FP41
URL:https://indico.fysik.su.se/event/3987/contributions/4916/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Lattice tight-binding Bogoliubov-de Gennes approach to nonuniform
superconductivity: Josephson junctions\, vortices\, and disorder
DTSTART;VALUE=DATE-TIME:20140915T094000Z
DTEND;VALUE=DATE-TIME:20140915T102000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4917@indico.fysik.su.se
DESCRIPTION:Speakers: Annica Black-Schaffer ()\nI will present results on
using a lattice tight-binding\nBogoliubov-de Gennes formulation of nonunif
orm\nsuperconducting systems and solving self-consistently for\nthe superc
onducting order parameter. Systems studied include\nJosephson junctions in
graphene and spin-orbit coupled\nsemiconductors\, superconducting vortice
s in spin-orbit\ncoupled semiconductors\, and studies of the local effect
of\nimpurities and disordered edges in unconventional\nsuperconductors. Wh
ile the method has limitations\,\nespecially with regards to system sizes
possible to study\,\nit offers a microscopically accurate description of t
he\nsuperconducting state\, which can be crucial for a correct\nphysical d
escription of nonuniform superconducting systems.\n\nhttps://indico.fysik.
su.se/event/3987/contributions/4917/
LOCATION:Nordita\, Stockholm FP41
URL:https://indico.fysik.su.se/event/3987/contributions/4917/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Afternoon Session: Controlled healing of graphene nanopores
DTSTART;VALUE=DATE-TIME:20141008T123000Z
DTEND;VALUE=DATE-TIME:20141008T143000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4918@indico.fysik.su.se
DESCRIPTION:Speakers: Kontantin Zakharchenko ()\nNanopores – nanometer-s
ize channels hold significant promise\nfor numerous applications: DNA sequ
encing\, sensing\,\nbiosensing and molecular detectors\, and catalysis and
water\ndesalination. However\, these applications require accurate\ncontr
ol over the size of the nanopores. Our simulations\nclearly point to at le
ast two distinct healing mechanisms\nfor graphene sheets: edge attachment
(where carbons are\nattached to the edges of the graphene sheet/pore) and
direct\ninsertion (where individual atoms insert directly into a\nsheet of
graphene\, even in the absence of the edges).\nThe insertion mechanism is
a surprising prediction that\npoints to the growth process that would be
operational in\npristine graphene. We have uncovered an unusual dependence
\nin the speed of nanopore regrowth and the structure of\n‘‘healed’
’ areas as a function of its size in a wide range\nof temperatures. Our
findings point to significantly more\ncomplicated pathways for graphene an
nealing.\n\nhttps://indico.fysik.su.se/event/3987/contributions/4918/
LOCATION:Nordita\, Stockholm 132:028
URL:https://indico.fysik.su.se/event/3987/contributions/4918/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Round table
DTSTART;VALUE=DATE-TIME:20140915T145000Z
DTEND;VALUE=DATE-TIME:20140915T153000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4919@indico.fysik.su.se
DESCRIPTION:https://indico.fysik.su.se/event/3987/contributions/4919/
LOCATION:Nordita\, Stockholm FP41
URL:https://indico.fysik.su.se/event/3987/contributions/4919/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Coffe break
DTSTART;VALUE=DATE-TIME:20140917T135000Z
DTEND;VALUE=DATE-TIME:20140917T141000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4921@indico.fysik.su.se
DESCRIPTION:https://indico.fysik.su.se/event/3987/contributions/4921/
LOCATION:Nordita\, Stockholm FP41
URL:https://indico.fysik.su.se/event/3987/contributions/4921/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Lunch
DTSTART;VALUE=DATE-TIME:20140917T110000Z
DTEND;VALUE=DATE-TIME:20140917T123000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4922@indico.fysik.su.se
DESCRIPTION:https://indico.fysik.su.se/event/3987/contributions/4922/
LOCATION:Nordita\, Stockholm Albanova Restaurant
URL:https://indico.fysik.su.se/event/3987/contributions/4922/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Discussion
DTSTART;VALUE=DATE-TIME:20140917T102000Z
DTEND;VALUE=DATE-TIME:20140917T110000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4923@indico.fysik.su.se
DESCRIPTION:https://indico.fysik.su.se/event/3987/contributions/4923/
LOCATION:Nordita\, Stockholm FP41
URL:https://indico.fysik.su.se/event/3987/contributions/4923/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Ab-initio calculations of nuclei with many-body perturbation theor
y
DTSTART;VALUE=DATE-TIME:20140917T131000Z
DTEND;VALUE=DATE-TIME:20140917T135000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4924@indico.fysik.su.se
DESCRIPTION:Speakers: Furong Xu ()\nWe start from a realistic nuclear forc
e (N3LO [1] or JISP16\n[2])\, and use the similarity renormalization group
(SRG) to\nrenormalize the realistic nuclear force. With the softened\nNN
force\, we first perform the Hartree-Fock (HF)\ncalculation\, and then tak
e the HF solution as the reference\nand basis for further corrections to t
he solution of the\nmany-body system. The many-body perturbation theory (M
BPT)\n[3] has been employed for the correction calculations.\nCorrections
up to the third order in energy and up to second\norder in radius have bee
n considered. As preliminary\ninvestigations\, we have calculated 4He and
16O\, obtaining\nquite good converged results in their binding energies an
d\nradii. We thank J. Vary for providing the JISP16 interaction\nand usefu
l discussions. [1] D.R. Entem and R. Machleidt\,\nPhys. Rev. C 68\, 041001
(32003)\; [2] A.M. Shirokov\, A.I.\nMazur\, S/A. Zaytsev\, J.P. Vary and
T.A. Weber\, Phys. Rev. C\n70\, 044005 (2004)\; [3] I. Shavitt and R.J. Ba
rtlett\,\nMany-body methods in Chemistry and physics: MBPT and\ncoupled-cl
uster theory (2009).\n\nhttps://indico.fysik.su.se/event/3987/contribution
s/4924/
LOCATION:Nordita\, Stockholm FP41
URL:https://indico.fysik.su.se/event/3987/contributions/4924/
END:VEVENT
BEGIN:VEVENT
SUMMARY:A new approach for large-scale shell-model calculations and large-
scale complex scaling calculations
DTSTART;VALUE=DATE-TIME:20140917T123000Z
DTEND;VALUE=DATE-TIME:20140917T131000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4925@indico.fysik.su.se
DESCRIPTION:Speakers: Takahiro Mizusaki ()\nIn my presentation\, I will pr
esent a new approach to\nnumerically solve shell model calculations and c
omplex\nscaling calculations\, which have real energy eigenvalues and\n co
mplex energy eigenvalues\, respectively. For shell model\ncalculations\, I
have already published in Ref.1 and this\nnew approach works as well as
the well-known Lanczos \nmethod. In an application concerning to isospin b
reaking\n[2]\, it is superior to the Lanczos method. I will show this\nnew
approach in detail. In the latter part of my\npresentation\, I will show
an extension of this work [3] to \ncomplex scaling calculations which is
useful to describe\nresonance states. This approach will be able to open\
nlarge-scale complex scaling calculations. This work is a\nresult of coll
aboration with Prof. K. Kaneko\, M. Honma\, T.\nSakurai\, Y. Sun\, S. Taz
aki\, G. de Angelis\, T. Myo and K.\nKato. Reference [1] T. Mizusaki\, K.
Kaneko\, M. Honma\, T.\nSakurai\, Phys. Rev. C82 024310 (2010). [2] T. Mi
zusaki\, K\,\nKaneko\, M. Honma\, K. Sakurai\, Acta Phsica Polonica B 42\,
447\n (2011). K. Kaneko\, T. Mizusaki\, Y. Sun\, S. Tazaki\, G. de\nAngel
is\, Phys. Rev. Lett. 109\, 092504 (2012). [3]\nT.Mizusaki\, T.Myo\, K.Ka
to\, to be submitted.\n\nhttps://indico.fysik.su.se/event/3987/contributio
ns/4925/
LOCATION:Nordita\, Stockholm FP41
URL:https://indico.fysik.su.se/event/3987/contributions/4925/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Superconductivity as a Universal Emergent Phenomenon in Diverse Ph
ysical Systems
DTSTART;VALUE=DATE-TIME:20140917T084000Z
DTEND;VALUE=DATE-TIME:20140917T092000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4926@indico.fysik.su.se
DESCRIPTION:Speakers: Mike Guidry ()\nSuperconductivity and superfluidity
having generically\nrecognizabl features are observed or suspected across
a\nstrikingly broad range of physical systems: traditional BCS\nsupercondu
ctors\, cuprate high temperature superconductors\, \niron-based high-tempe
rature superconductors\, organic\nsuperconductors\, heavy-fermion superco
nductors\, and\nsuperfluid helium-3 in condensed matter\, in many aspects
of\nlow-energy nuclear structure physics\, and in various exotic\n possib
ilities for gravitationally condensed objects such as\nneutron stars. Mic
roscopically these systems differ\nfundamentally but the observed superco
nductivity and\nsuperfluidity exhibit two universal features: (1) They \nr
esult from a condensate of fermion Cooper pairs\, and (2)\nThey represent
emergent collective behavior that can have\nonly an abstract dependence o
n the underlying microscopic\nphysics. This universality can hardly be a
coincidence but\na unified understanding of superconductivity and\nsuperf
luidity across these highly disparate fields seems\nimpossible microscopi
cally. A unified picture may be\npossible if superconductivity and super
fluidity are viewed\nas resulting from physics that depends only on broad
\nphysical principles operating systematically at the\nemergent scale\, w
ith physics at the underlying microscopic\nscale entering only parametric
ally. I will give an \noverview of superconductivity and superfluidity fo
und in\nvarious fermionic condensed matter\, nuclear physics\, and\nneutr
on star systems. I will then propose that all these\nphenomena result fr
om the systematic occurrence of generic\nalgebraic structures for the eme
rgent effective Hamiltonian\,\nwith the underlying microscopic physics be
ing largely\nirrelevant except for influencing parameter values.\n\nhttps
://indico.fysik.su.se/event/3987/contributions/4926/
LOCATION:Nordita\, Stockholm FP41
URL:https://indico.fysik.su.se/event/3987/contributions/4926/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Clustering and response functions of light nuclei in explicitly co
rrelated Gaussians
DTSTART;VALUE=DATE-TIME:20140917T080000Z
DTEND;VALUE=DATE-TIME:20140917T084000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4927@indico.fysik.su.se
DESCRIPTION:Speakers: Yasuyuki Suzuki ()\nExplicitly correlated Gaussian b
asis is used for solving\nfew-body problems in many fields. The basis func
tions are\neasily adaptable and flexible enough to describe complex\nfew-b
ody dynamics. We obtain a unified description of\ndifferent types of stru
cture and a fair account of\ncorrelated motion of interacting particles as
well as the\ntail of the wave function. I present some examples that show
\nthe power of the correlated Gaussians: The bound and\nresonant states o
f 4He\, the electric dipole response\nfunctions of 4He and 6He\, and alpha
-clustering in 16O in the\nframework of a 12C core plus four nucleon model
. \nIt is a challenge for future to extend the application of\nthe correla
ted Gaussians to a study on a competition between\nsingle-particle motion
and clustering around a non-inert\ncore. Such a study will be important to
evaluate the rate of\nthe radiative capture reactions 12C(alpha\, gamma)1
6O at low\nenergy and to account for the low-lying spectrum of 212Po\nthat
shows the large alpha-decay width and the enhanced\nelectric dipole trans
itions.\n\nhttps://indico.fysik.su.se/event/3987/contributions/4927/
LOCATION:Nordita\, Stockholm FP41
URL:https://indico.fysik.su.se/event/3987/contributions/4927/
END:VEVENT
BEGIN:VEVENT
SUMMARY:No-Core CI calculations of light nuclei: Emergence of rotational b
ands
DTSTART;VALUE=DATE-TIME:20140917T094000Z
DTEND;VALUE=DATE-TIME:20140917T102000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4928@indico.fysik.su.se
DESCRIPTION:Speakers: Pieter Maris ()\nThe atomic nucleus is a self-bound
system of strongly\ninteracting nucleons. In No-Core Configuration Intera
ction\n(CI) calculations\, the nuclear wavefunction is expanded in a\nbasi
s of Slater Determinants of single-nucleon wavefunctions\n(Configurations)
\, and the many-body Schrödinger equation\nbecomes a large sparse matrix
problem. The challenge is to\nreach numerical convergence to within quanti
fiable numerical\nconvergence to within quantifiable numerical uncertainti
es\nfor physical observables using finite truncations of the\ninfinite-dim
ensional basis space. I discuss the\n(dis)advantages of different truncati
on schemes\, as well as\nstrategies for constructing and solving the resul
ting large\nsparse matrices of current multi-core computer\narchitectures.
Several of these strategies have been\nimplemented in the code MFDn\, a h
ybrid MPI/OpenMP Fortran\ncode for ab-initio nuclear structure calculation
s that has\nbeen demonstrated to scale to over 200\,000 cores. Finally\, I
\npresent results for ground state energies\, excitation\nspectra\, and se
lect electromagnetic observables for light\nnuclei in the A=6 to 14 range
using realistic 2- and 3-body\nforces. In particular\, I demonstrate that
collective\nphenomena such as rotational band structures can emerge from\n
these microscopic calculations.\n\nhttps://indico.fysik.su.se/event/3987/c
ontributions/4928/
LOCATION:Nordita\, Stockholm f
URL:https://indico.fysik.su.se/event/3987/contributions/4928/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Coffe break
DTSTART;VALUE=DATE-TIME:20140917T092000Z
DTEND;VALUE=DATE-TIME:20140917T094000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4929@indico.fysik.su.se
DESCRIPTION:https://indico.fysik.su.se/event/3987/contributions/4929/
LOCATION:Nordita\, Stockholm f
URL:https://indico.fysik.su.se/event/3987/contributions/4929/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Open-shell systems via symmetry (broken and) restored coupled clus
ter theory
DTSTART;VALUE=DATE-TIME:20140918T084000Z
DTEND;VALUE=DATE-TIME:20140918T092000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4930@indico.fysik.su.se
DESCRIPTION:Speakers: Thomas Duguet ()\nAb initio many-body methods have b
een developed over the\npast ten years to address closed-shell nuclei up t
o mass\n$\\text{A}\\sim 130$ on the basis of realistic two- and\nthree-nuc
leon interactions. A current frontier relates to\nthe extension of those m
any-body methods to the description\nof open-shell nuclei. Several routes
are currently under\ninvestigation to do so among which one relies on the\
npowerful concept of spontaneous symmetry breaking. Singly\nopen-shell nuc
lei can be efficiently described via the\nbreaking of U(1) gauge symmetry
associated with\nparticle-number conservation\, as a way to account for th
eir\nsuperfluid character. Doubly open-shell nuclei can be\naddressed by f
urther breaking SU(2) symmetry associated with\nangular momentum conservat
ion. Still\, the description of\nfinite quantum systems eventually require
s the exact\nrestoration of symmetry quantum numbers. In this context\, we
\ndiscuss two recent developments performed within the frame\nof single-re
ference coupled cluster theory. First\, we\npresent the Bogoliubov coupled
cluster formalism\, which\nconsists of representing the exact ground-stat
e wave\nfunction of the system as the exponential of a\nquasi-particle exc
itation cluster operator acting on a\nBogoliubov reference state. Test cal
culations for the\npairing Hamiltonian are presented along with realistic\
nproof-of-principle calculations of even-even nuclei with \n$\\text{A} \\
approx 20$. Second\, we discuss a recent extension\nof symmetry-unrestrict
ed coupled-cluster theory that allows\nfor the exact restoration of the br
oken symmetry at any\ntruncation order. The formalism\, which encompasses
both\nsingle-reference coupled cluster theory and projected\nHartree-Fock
theory as particular cases\, permits the\ncomputation of usual sets of con
nected diagrams while\nconsistently incorporating static correlations thro
ugh the\nhighly non-perturbative restoration of the symmetry. A key\ndiffi
culty relates to the necessity to handle generalized\nenergy {\\it and} no
rm kernels for which naturally\nterminating coupled-cluster expansions are
indeed obtained.\nThe focus is on SU(2) and U(1) symmetries but the forma
lism\ncan be extended to any (locally) compact Lie group and to\ndiscrete
groups\, such as most point groups.\n\nhttps://indico.fysik.su.se/event/39
87/contributions/4930/
LOCATION:Nordita\, Stockholm f
URL:https://indico.fysik.su.se/event/3987/contributions/4930/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Afternoon Session: Neutron-Nucleus Interactions at Low Energies
DTSTART;VALUE=DATE-TIME:20140930T123000Z
DTEND;VALUE=DATE-TIME:20140930T143000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4931@indico.fysik.su.se
DESCRIPTION:Speakers: Jouni Suhonen ()\nhttps://indico.fysik.su.se/event/3
987/contributions/4931/
LOCATION:Nordita\, Stockholm 132:028
URL:https://indico.fysik.su.se/event/3987/contributions/4931/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Discussion
DTSTART;VALUE=DATE-TIME:20140918T100000Z
DTEND;VALUE=DATE-TIME:20140918T110000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4932@indico.fysik.su.se
DESCRIPTION:https://indico.fysik.su.se/event/3987/contributions/4932/
LOCATION:Nordita\, Stockholm FP41
URL:https://indico.fysik.su.se/event/3987/contributions/4932/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Afternoon Session: Signature of the FFLO phase in the collective m
ode spectrum of ultracold Fermi gases
DTSTART;VALUE=DATE-TIME:20140929T133000Z
DTEND;VALUE=DATE-TIME:20140929T143000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4933@indico.fysik.su.se
DESCRIPTION:Speakers: Jonathan Edge ()\nWe study theoretically the collect
ive modes of a\ntwo-component Fermi gas with attractive interactions in a\
nquasi-one-dimensional harmonic trap. We focus on an\nimbalanced gas in th
e Fulde-Ferrell-Larkin-Ovchinnikov\n(FFLO) phase. Using a mean-field theor
y\, we study the\nresponse of the ground state to time-dependent potential
s. \nFor potentials with short wavelengths\, we find dramatic\nsignatures
in the large-scale response of the gas which are\ncharacteristic of the FF
LO phase. This response provides an\neffective way to detect the FFLO stat
e in experiments.\n\nhttps://indico.fysik.su.se/event/3987/contributions/4
933/
LOCATION:Nordita\, Stockholm 132:028
URL:https://indico.fysik.su.se/event/3987/contributions/4933/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Nucleon-pair Approximation of the shell model
DTSTART;VALUE=DATE-TIME:20140917T145000Z
DTEND;VALUE=DATE-TIME:20140917T153000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4934@indico.fysik.su.se
DESCRIPTION:Speakers: Yu-Min Zhao ()\nAtomic nuclei are complex systems of
protons and neutrons\nthat strongly interact with each other via an attr
active and\nshort-range force\, leading to a pattern of dominantly\nmonopo
le and quadrupole correlations between like particles\n(i.e.\, proton-prot
on and neutron-neutron correlations) in\nlow-lying states of atomic nuclei
. Among many nucleon pairs\,\nvery few nucleon pairs such as proton and ne
utron pairs with\nspin zero\, two\, and occasionally isoscalar proton-neut
ron\npairs with spin aligned\, play a\ndominant role in low-energy nuclear
structure. Therefore the\nnucleon-pair approximation provides us with an
efficient\ntruncation scheme of the full shell model configurations\nwhich
are otherwise too large to handle for medium and heavy\nnuclei. Furthemor
e\, the nucleon-pair approximation leads to\nsimple pictures in physics\,
as the dimension of nucleon-pair\nsubspace is small. In this talk I would
like to give a\nbrief review of its history\, formulation\, validity\,\na
pplications\, as well as its link to previous\napproaches. Numerical calcu
lations of low-lying states for\nrealistic atomic nuclei are demonstrated
with examples.\nApplications of pair approximations to other problems are\
nalso discussed.\n\nhttps://indico.fysik.su.se/event/3987/contributions/49
34/
LOCATION:Nordita\, Stockholm FP41
URL:https://indico.fysik.su.se/event/3987/contributions/4934/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Pairing Theory of the Wigner energy
DTSTART;VALUE=DATE-TIME:20140926T123000Z
DTEND;VALUE=DATE-TIME:20140926T143000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4935@indico.fysik.su.se
DESCRIPTION:Speakers: Kai Neergaard ()\nIn 1936\, Bethe and Bacher suggest
ed that when the Coulomb\nenergy is neglected\, the masses of nuclei with
given mass\nnumber A=N+Z\, where N and Z are the numbers of neutrons and\n
protons\, rise from N=Z approximately quadratically in N-Z. \nMyers and Sw
iatecki found in 1966 a marked deviation from\nthis rule\; for small |N-Z|
the mass rises more rapidly. They\ncalled the resulting apparent extra bi
nding energy in the\nvicinity of N=Z the Wigner energy. It will be shown
that this\nnonanalytic behaviour of the mass as a function of N-Z arises\n
naturally when the pairing force is taken into account\nbeyond a mean fiel
d approximation. In the limit of an\nequidistant single nucleon spectrum\
, the symmetry energy\,\nthat is\, the increment of the mass from N=Z in t
he absence\nof the Coulomb energy\, is proportional to T(T+1)\, where T is
\nthe isospin\, in the ground state of a doubly even nucleus\nequal to |N-
Z|/2. This expression is similar to the one\nwhich describes the spectrum
of a quantal\, axially symmetric\nrotor\, and Frauendorf and Scheikh iden
tified in 1999 the\ndeformation which gives rise to an analogous rotation
in\nisospace as the superfluid pair gap. Large shell corrections\nmodify t
his bulk behaviour. In recent work by Bentley and\nFrauendorf\, partly in
collaboration with the speaker\,\nvarious approaches to the treatment of
these shell\ncorrections are\nconsidered. In one approach the pairing for
ce is\ndiagonalised exactly in a small valence space. More\nrecently\, th
e usual pairing correction of the\nNilsson-Strutinsky theory is supplement
ed with a term\nderived from the Random Phase Approximation. The resultin
g\ntheory reproduces quite well the empirical masses in the\nvicinity of N
=Z for A not less\nthan 24. A very recent generalisation of the method\,
which\nallows its application throughout the chart of nuclides and\nalso o
n top of a formalism of the Hartree-Fock type\, will be\ndiscussed.\n\nhtt
ps://indico.fysik.su.se/event/3987/contributions/4935/
LOCATION:Nordita\, Stockholm 132:028
URL:https://indico.fysik.su.se/event/3987/contributions/4935/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Morning Session: Quantum Optics
DTSTART;VALUE=DATE-TIME:20141002T073000Z
DTEND;VALUE=DATE-TIME:20141002T093000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4939@indico.fysik.su.se
DESCRIPTION:Speakers: Jonas Larson ()\nChair: Jorge Dukelsky\n\nhttps://in
dico.fysik.su.se/event/3987/contributions/4939/
LOCATION:Nordita\, Stockholm 132:028
URL:https://indico.fysik.su.se/event/3987/contributions/4939/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Afternoon Session: Odd frequency pairing in hybrid structures and
multiband superconductors
DTSTART;VALUE=DATE-TIME:20140929T123000Z
DTEND;VALUE=DATE-TIME:20140929T131000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4942@indico.fysik.su.se
DESCRIPTION:Speakers: Alexander Balatsky ()\nOdd frequency superconductivi
ty proved to be an elusive\nstate that is yet to be observed as a primary
pairing state.\nOn the other hand the list of systems and structures where
\nodd frequency can be present as an induced component is\ngrowing. I will
review various scenarios pointing to\nemergence of odd frequency pairing
due to modifications of\nthe primary conventional pairing. Recently we fin
d that odd\nfrequency component is ubiquitously present in multiband\nsupe
rconductors. We show that odd-frequency\nsuperconducting pairing require
s only a finite band\nhybridization\, or scattering\, and non-identical in
traband\norder parameters\, of which only one band needs to be\nsupercondu
cting. From a symmetry analysis we establish a\ncomplete reciprocity betwe
en parity in band-index and\nfrequency. I will also discuss extensions of
the odd\nfrequency superconductivity to the spin and boson systems.\n\nhtt
ps://indico.fysik.su.se/event/3987/contributions/4942/
LOCATION:Nordita\, Stockholm 132:028
URL:https://indico.fysik.su.se/event/3987/contributions/4942/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Morning session: Coupled Clusters
DTSTART;VALUE=DATE-TIME:20140924T073000Z
DTEND;VALUE=DATE-TIME:20140924T093000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4943@indico.fysik.su.se
DESCRIPTION:Speakers: Gustavo Scuseria ()\nUnconventional Coupled Cluster
Theories for Strong and Weak\nCorrelations\n\nCoupled cluster (CC) theory
with single and double\nexcitations accurately describes weak electron cor
relation\nbut is known to fail in cases of strong static correlation.\nFas
cinatingly\, however\, pair coupled cluster doubles\n(p-CCD)\, a simplifie
d version of the theory limited to pair\nexcitations that preserve the sen
iority of the reference\ndeterminant (i.e.\, the number of unpaired elect
rons) has\nmean field computational cost and is an excellent\napproximatio
n to the full configuration interaction (FCI) of\nthe paired space provide
d that the orbital basis is\noptimized to adequately define a pairing sche
me. In previous\nwork [1]\, we have shown that optimization of the pairing
\nscheme in the seniority zero FCI leads to a very accurate\ndescription
of static correlation. The same conclusion\nextends to p-CCD [2] if the or
bitals are optimized to make\nthe p-CCD energy \nstationary [3]. The exten
sion of this pair model to\nquasiparticles will be addressed [4]. We addit
ionally\ndiscuss renormalized Hamiltonians via similarity\ntransformation
based on Gutzwiller projectors and other\nexponential forms to describe re
sidual weak correlations [5].\n[1] Seniority and orbital symmetry as tools
for establishing\na full configuration interaction hierarchy\, L. Bytauta
s\, T.\nM. Henderson\, C. A. Jimenez-Hoyos\, J. K. Ellis\, and G. E.\nScu
seria\, J. Chem. Phys. 135\, 044119 (2011).\n[2] Seniority zero pair coupl
ed cluster doubles theory\, T.\nStein\, T. M. Henderson\, and G. E. Scuser
ia\, J. Chem. Phys.\n140\, 214113 (2014).\n[3] The optimization of molecul
ar orbitals for coupled\ncluster wavefunctions\, G. E. Scuseria and H. F.
Schaefer\,\nChem. Phys. Lett. 142\, 354 (1987).\n[4] Quasiparticle coupled
cluster theory for pairing\ninteractions\, T. M. Henderson\, G. E. Scuse
ria\, J. Dukelsky\,\nA. Signoracci\, and T. Duguet\, Phys. Rev. C 89\, 054
305 (2014).\n[5] Noncompact similarity transformed Hamiltonians for\nlatti
ce models\, J. Wahlen-Strothman\, C. A. Jimenez-Hoyos\, T.\nM. Henderson\,
and G. E. Scuseria\, in preparation.\n\nhttps://indico.fysik.su.se/event/
3987/contributions/4943/
LOCATION:Nordita\, Stockholm 132:028
URL:https://indico.fysik.su.se/event/3987/contributions/4943/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Afternoon Session: Coupled Cluster Methods
DTSTART;VALUE=DATE-TIME:20140924T123000Z
DTEND;VALUE=DATE-TIME:20140924T143000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4945@indico.fysik.su.se
DESCRIPTION:Speakers: Piotr Piecuch ()\nSINGLE-REFERENCE COUPLED-CLUSTER M
ETHODS FOR MULTI-REFERENCE\nMOLECULAR PROBLEMS\nPiotr Piecuch\, Jun Shen\,
Nicholas P. Bauman\, and Jared A. Hansen\n\nAccurate modeling of chemical
reactions and photochemistry\nrequires a balanced treatment of dynamical
and non-dynamical\nmany-electron correlation effects. The popular\nsingle-
reference coupled-cluster (CC) and equation-of-motion\nCC (EOMCC) methods\
, such as CCSD(T) and EOMCCSD\, capture the\nformer effects very effective
ly\, but have difficulties with\nthe latter ones\, whereas multi-reference
CC theories that\nare supposed to capture both types of correlations cont
inue\nfacing unresolved problems. This talk will discuss pragmatic\nways o
f addressing this situation via the completely\nrenormalized and active-sp
ace CC and EOMCC theories\, and\ntheir recent merger via the novel CC(P\;Q
) formalism\, which\nreproduces the nearly exact relative and total electr
onic\nenergies in ground and excited states at the small fractions\nof com
puter costs of other methods that aim at similar\naccuracies. The developm
ent of the singly and doubly ionized\nand electron-attached variants of th
e active-space EOMCC\nmethodology\, which provide an excellent description
of\nelectronic excitations in radicals\, biradicals\, and other\nsimilar
open-shell systems around closed shells at the low\ncomputational costs co
mpared to the parent approaches\, will\nbe addressed\, too.\n\nhttps://ind
ico.fysik.su.se/event/3987/contributions/4945/
LOCATION:Nordita\, Stockholm 132:028
URL:https://indico.fysik.su.se/event/3987/contributions/4945/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Discussion
DTSTART;VALUE=DATE-TIME:20140916T100000Z
DTEND;VALUE=DATE-TIME:20140916T110000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4946@indico.fysik.su.se
DESCRIPTION:https://indico.fysik.su.se/event/3987/contributions/4946/
LOCATION:Nordita\, Stockholm FP41
URL:https://indico.fysik.su.se/event/3987/contributions/4946/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Towards the entanglement of strongly coupled fermions via lattice
Monte Carlo
DTSTART;VALUE=DATE-TIME:20140916T092000Z
DTEND;VALUE=DATE-TIME:20140916T100000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4948@indico.fysik.su.se
DESCRIPTION:Speakers: Joaquin Drut ()\nThe calculation of the entanglement
properties of strongly\ncoupled many-body systems\, in particular Renyi a
nd von\nNeumann entropies\, continues to be an active research area\nwith
many open questions. In this talk\, I will outline the\nchallenges and des
cribe some of the advances\, by my group\nand others\, towards the charact
erization of entanglement in\nnon-relativistic many-fermion systems using
novel lattice\nMonte Carlo strategies.\n\nhttps://indico.fysik.su.se/event
/3987/contributions/4948/
LOCATION:Nordita\, Stockholm FP41
URL:https://indico.fysik.su.se/event/3987/contributions/4948/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Coffe break
DTSTART;VALUE=DATE-TIME:20140916T135000Z
DTEND;VALUE=DATE-TIME:20140916T141000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4950@indico.fysik.su.se
DESCRIPTION:https://indico.fysik.su.se/event/3987/contributions/4950/
LOCATION:Nordita\, Stockholm FP41
URL:https://indico.fysik.su.se/event/3987/contributions/4950/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Path integral simulations of bosons with disorder
DTSTART;VALUE=DATE-TIME:20140919T131000Z
DTEND;VALUE=DATE-TIME:20140919T135000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4964@indico.fysik.su.se
DESCRIPTION:Speakers: Mats Wallin ()\nMonte Carlo simulation of worldlines
of quantum particles in\na path integral representation is a powerful too
l mainly\nused for studying boson systems. Such approaches have been\nuse
d to investigate properties of superfluid helium in\nconfined geometries a
nd localization of bosons in a random\ndisorder potential. In particular w
e are interested in the\nrole of correlations of the disorder distribution
. I will\nintroduce theoretical tools and techniques and discuss\nopportun
ities\, difficulties and challenges in this field.\n\nhttps://indico.fysik
.su.se/event/3987/contributions/4964/
LOCATION:Nordita\, Stockholm FP41
URL:https://indico.fysik.su.se/event/3987/contributions/4964/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The isospin- and angular-momentum-projected density functional the
ory and beyond: formalism and applications
DTSTART;VALUE=DATE-TIME:20140916T141000Z
DTEND;VALUE=DATE-TIME:20140916T145000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4951@indico.fysik.su.se
DESCRIPTION:Speakers: Wojciech Satula ()\nOver the last few years we have
developed the\nmulti-reference density functional theory (DFT) involving\n
the isospin- and angular-momentum projections of a single\nSlater determin
ant. The model\, dubbed below static\, was\nspecifically designed to treat
rigorously the conserved\nrotational symmetry and\, at the same time\, ta
ckle the\nexplicit breaking of the isospin symmetry resulting from a\nsubt
le balance between the long-range\nisospin-symmetry-breaking Coulomb field
and short-range\nisospin-symmetry-conserving (predominantly) strong force
.\nThese unique features allowed us to calculate\, in between\,\nthe isosp
in impurities in N~Z nuclei and isospin symmetry\nbreaking corrections (IS
B) to superallowed Fermi beta-decay\nmatrix elements. Recently\, we have
extended the model to a\nvariant (hereafter called dynamic) that allows fo
r mixing of\nstates that are projected from self-consistent Slater\ndeterm
inants representing low-lying\n(multi)particle-(multi)hole excitations. Th
e states that are\nmixed have good angular momentum and\, at the same time
\,\ninclude properly treated Coulomb isospin mixing. Hence\, the\nextended
model can be considered as a variant of the no core\nconfiguration-intera
ction approach\, with two-body\nshort-range (hadronic) and long-range (Cou
lomb) interactions\ntreated on the same footing. It is based on a truncati
on\nscheme dictated by the self-consistent deformed Hartree-Fock\n(HF) sol
utions. The model can be used to calculate spectra\,\ntransitions\, and be
ta-decay matrix elements in any nuclei\,\nirrespective of their neutron- a
nd proton-number parities. \nThe aim of the talk is to introduce the theor
etical\nframeworks of both the static and dynamic approaches and\npresent
selected applications. The applications will be\nfocused on nuclei relevan
t to high-precision tests of the\nweak-interaction flavor-mixing sector of
the Standard Model.\nIn this context\, we will present the results for IS
B\ncorrections to superallowed Fermi transitions and for the\nlow-spin spe
ctra in: 32S and 32Cl nuclei\, in A=38 Ar\, K\, and\nCa nuclei\, and in 62
Ga and 62Zn nuclei. In case of 62Zn the\nspectrum of 0+ states will be add
ressed. The 0+ states in\nthis nucleus were reassigned in a recent experim
ent\, and are\nnow posing a challenge to theory.\n\nhttps://indico.fysik.s
u.se/event/3987/contributions/4951/
LOCATION:Nordita\, Stockholm FP41
URL:https://indico.fysik.su.se/event/3987/contributions/4951/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Pfaffians in nuclear structure theory
DTSTART;VALUE=DATE-TIME:20140916T123000Z
DTEND;VALUE=DATE-TIME:20140916T131000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4952@indico.fysik.su.se
DESCRIPTION:Speakers: Luis Robledo ()\nIn those branches of physics involv
ing quantum many body\nsystems\, mean field states are a good starting poi
nt for any\ntheoretical study. One of the advantages of mean field \nstate
s is the existence of generalized Wick theorems that\nsimplify the evaluat
ion of operator overlaps. Unfortunately\,\nthe number of terms to be consi
dered increase with the\ndouble factorial of the number of creation and an
nihilation\noperators in the overlap. This and other problems that\nappear
when the mean field states are of the Hartree Fock\nBogoliubov (HFB) typ
e can be easily handled introducing\nfermion coherent state techniques and
the pfaffian. In my\ntalk I will discuss this technique and the applicati
ons\ninvolving HFB states in the context of symmetry restoration\nand conf
iguration techniqes common in low energy nuclear\nstructure calculations.\
n\nhttps://indico.fysik.su.se/event/3987/contributions/4952/
LOCATION:Nordita\, Stockholm FP41
URL:https://indico.fysik.su.se/event/3987/contributions/4952/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Auxiliary-field calculations with or without the sign problem:from
Fermi gases to molecules to solids
DTSTART;VALUE=DATE-TIME:20140916T131000Z
DTEND;VALUE=DATE-TIME:20140916T135000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4953@indico.fysik.su.se
DESCRIPTION:Speakers: Shiwei Zhang ()\nI will describe recent progress in
developing a general\nframework for accurate ground-state calculations of\
ninteracting electronic systems. This framework is based on\nthe use of au
xiliary-fields\, and addresses the sign problem\n(which turns into a phase
problem for realistic\nelectron-electron interactions) by constraining th
e\nimaginary-time\npaths with an approximate sign (gauge) condition. The\n
approach can be used to study either a fully\nmaterials-specific Hamiltoni
an or a Hubbard-like model ---\nor indeed any electronic Hamiltonian in be
tween as the\nformer is ``down-folded'' to the latter.\nAs an example of m
aterials-specific calculations\, we\ndetermine the equation of state in a
variety of solids\,\nwhich systematically removes deficiencies of\ndensity
-functional theory (DFT) results. As an example of\nmodel studies\, the na
ture of magnetic and charge\ncorrelations in the doped Hubbard model are d
etermined\, in\nthe context of models for high-temperature\nsuperconductiv
ity. Its implications on the search for\nso-called FFLO phases with cold a
toms will be discussed.\nWe also present exact results on the properties o
f the\ntwo-dimensional ultracold Fermi gas. Calculations in systems\nwith
strong spin-orbit coupling will be discussed.\n\nhttps://indico.fysik.su.s
e/event/3987/contributions/4953/
LOCATION:Nordita\, Stockholm FP41
URL:https://indico.fysik.su.se/event/3987/contributions/4953/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Round table
DTSTART;VALUE=DATE-TIME:20140916T145000Z
DTEND;VALUE=DATE-TIME:20140916T153000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4954@indico.fysik.su.se
DESCRIPTION:https://indico.fysik.su.se/event/3987/contributions/4954/
LOCATION:Nordita\, Stockholm FP41
URL:https://indico.fysik.su.se/event/3987/contributions/4954/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Lunch
DTSTART;VALUE=DATE-TIME:20140919T110000Z
DTEND;VALUE=DATE-TIME:20140919T123000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4956@indico.fysik.su.se
DESCRIPTION:https://indico.fysik.su.se/event/3987/contributions/4956/
LOCATION:Nordita\, Stockholm Albanova Restaurant
URL:https://indico.fysik.su.se/event/3987/contributions/4956/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Discussion
DTSTART;VALUE=DATE-TIME:20140919T100000Z
DTEND;VALUE=DATE-TIME:20140919T110000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4957@indico.fysik.su.se
DESCRIPTION:https://indico.fysik.su.se/event/3987/contributions/4957/
LOCATION:Nordita\, Stockholm FP41
URL:https://indico.fysik.su.se/event/3987/contributions/4957/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Disorder in bilayer and double layer graphene
DTSTART;VALUE=DATE-TIME:20140919T092000Z
DTEND;VALUE=DATE-TIME:20140919T100000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4959@indico.fysik.su.se
DESCRIPTION:Speakers: David Abergel ()\nWe use a numerical application of
Thomas-Fermi theory to\ndescribe the effects of fluctuations in the local
charge\ndensity caused by charged impurities in bilayer and double\nlayer
graphene. In the bilayer\, we show that the interplay\nbetween the non-lin
ear screening of the disorder potential\nand a band gap causes the electro
n liquid to break into\ncoexisting compressible and incompressible regions
. For\ndouble layer graphene\, we demonstrate that charged impurity\ndisor
der has\na significant negative impact on the existence of\ntheproposed ex
citonic condensate.\n\nhttps://indico.fysik.su.se/event/3987/contributions
/4959/
LOCATION:Nordita\, Stockholm FP41
URL:https://indico.fysik.su.se/event/3987/contributions/4959/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Integrable Richardson-Gaudin bases for pairing Hamiltonians
DTSTART;VALUE=DATE-TIME:20140919T084000Z
DTEND;VALUE=DATE-TIME:20140919T092000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4960@indico.fysik.su.se
DESCRIPTION:Speakers: Stijn De Baerdemacker ()\nConfiguration interaction
methods for quantum many-body\nsystems are generally represented within Fo
ck space\, the\nspace spanned by all possible single-particle Slater\ndete
rminant (SD) wave functions. For strongly-correlated\nquantum systems\, t
he number of physically important SD basis\nstates quickly reaches beyond
the capacities of present (and\nfuture) computer hardware\, due to the lac
k of correlations\nwithin these SD basis states. Bases spanned by\nRichar
dson-Gaudin (RG) eigenstates can be regarded as a\ngeneralisation of Fock
space\, because the strong\ncorrelations are inherently present within the
basis states.\n In this contribution\, it will be shown how configuration
\ninteraction methods can benefit from the use of RG bases\nover conventio
nal Fock space.\n\nhttps://indico.fysik.su.se/event/3987/contributions/496
0/
LOCATION:Nordita\, Stockholm FP41
URL:https://indico.fysik.su.se/event/3987/contributions/4960/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Coffe break
DTSTART;VALUE=DATE-TIME:20140919T082000Z
DTEND;VALUE=DATE-TIME:20140919T084000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4961@indico.fysik.su.se
DESCRIPTION:https://indico.fysik.su.se/event/3987/contributions/4961/
LOCATION:Nordita\, Stockholm FP41
URL:https://indico.fysik.su.se/event/3987/contributions/4961/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Tensor methods and entanglement measurements for models with long-
range interactions
DTSTART;VALUE=DATE-TIME:20140919T074000Z
DTEND;VALUE=DATE-TIME:20140919T082000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4962@indico.fysik.su.se
DESCRIPTION:Speakers: Örs Legeza ()\nStrongly correlated materials are ty
pically rather difficult\nto treat theoretically. They have a complicated
band\nstructure\, and it is quite difficult to determine which\nminimal mo
del correctly describes their essential physical\nproperties. Moreover\, t
he value of the model parameters to\nbe used for a given material is often
the subject of debate.\nUnfortunately\, analytic approaches often do not
provide\nrigorous conclusions for the interesting parameter sets\,\ntheref
ore\, numerical simulations are mandatory.\nMomentum-space formulations of
local models such as the\nHubbard model and problems in quantum chemistry
are\nespecially hard to treat using matrix- and tensor\nproduct-based alg
orithms because they contain non-local\ninteractions. Quantum entropy-base
d measures can be used\nto map the entanglement structure in order to gain
physical\ninformation and to optimize algorithms.\nIn this tutorial contr
ibution\, we present an overview of the\nreal space\, momentum space and q
uantum chemistry versions of\nthe DMRG/MPS and tree-TNS algorithms and the
ir applications\nto various spin and fermionic lattice models\, and to\ntr
ansition metal complexes. Data sparse representation of\nthe wavefunction
will be investigated through advances in\nentanglement localization provid
ing optimized tensor\ntopologies. Entropy generation by the RG procedure\,
the\nmutual information leading to a multiply connected network\nof latti
ce sites or orbitals\, and reduction of entanglement\nby basis transformat
ion will be discussed. Inclusion of the\nconcepts of entanglement will be
used to identify the wave\nvector of soft modes in critical models\, to de
termine highly\ncorrelated molecular orbitals leading to an efficient\ncon
struction of active spaces and for characterizing the\nvarious types of co
rrelation effects relevant for chemical\nbonding.\nThe state of the art ma
trix-product-based algorithms is\ndemonstrated on polydiacetylene chains b
y reproducing\nexperimentally measured quantities with high accuracy.\n[1]
S. R. White\, Phys. Rev. Lett. 69\, 2863-2866 (1992).\n[2] S. R. White an
d R. L. Martin\, J. Chem. Phys. 110\,\n4127-4130 (1999).\n[3] O. Legeza\,
R. M. Noack\, J. SĂłlyom\, and L. Tincani\, in\nComputational Many-Parti
cle Physics\, eds. H. Fehske\, R.\nSchneider\, and A. Weisse 739\, 653-664
(2008).\n[4] K. H. Marti and M. Reiher\, Z. Phys. Chem. 224\, 583-599\n(2
010).\n[5] G. K.-L. Chan and S. Sharma\, Annu. Rev. Phys. Chem. 62\,\n465-
481 (2011).\n[6] O. Legeza and J. SĂłlyom\, Phys. Rev. B 68\, 195116\n(2
003)\, ibid Phys Rev. B 70\, 205118 (2004).\n[7] J. Rissler\, R.M.Noack\,
and S.R. White\, Chemical Physics\,\n323\, 519 (2006).\n[8] K. Boguslawski
\, P. Tecmer\, O. Legeza\, and M. Reiher\, J.\nPhys. Chem. Lett. 3\, 3129-
3135 (2012).\n[9] K. Boguslawski\, P. Tecmer\, G. Barcza\, O. Legeza\, and
M.\nReiher\, J. Chem. Theory Comp. (2013).\n[10] F. Verstraete\, J.I. Cir
ac\, V. Murg\, Adv. Phys. 57 (2)\,\n143 (2008).\n[11] V. Murg\, F. Verstra
ete\, O. Legeza\, and R. M. Noack\,\nPhys. Rev. B 82\, 205105 (2010).\n[12
] V. Murg\, F. Verstraete\, R. Schneider\, P. Nagy and O.\nLegeza\, arxiv:
1403.0981 (2014).\n[13] G. Barcza\, O. Legeza\, K. H. Marti\, and M. Reihe
r\, Phys.\nRev. A 83\, 012508 (2011).\n[14] G. Barcza\, R. M. Noack\, J. S
Ăłlyom\, O. Legeza\,\narxiv:1406.6643 (2014)\n\nhttps://indico.fysik.su.
se/event/3987/contributions/4962/
LOCATION:Nordita\, Stockholm FP41
URL:https://indico.fysik.su.se/event/3987/contributions/4962/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Aspects of time-dependence in many-body systems
DTSTART;VALUE=DATE-TIME:20140919T123000Z
DTEND;VALUE=DATE-TIME:20140919T131000Z
DTSTAMP;VALUE=DATE-TIME:20211020T014503Z
UID:indico-contribution-3987-4965@indico.fysik.su.se
DESCRIPTION:Speakers: Daniela Pfannkuche ()\nDynamical processes set yet a
nother degree of complexity to\nthe many-body problem. With the advent of
ultrafast\nmeasuring techniques modern experiments often leave the\nregime
of adiabaticity or linear response. The evolution of\nquantum systems on
short time scales subject to strong\ndisturbances then becomes relevant. I
n this contribution\, I\nwill present two different examples that demonstr
ate aspects\nof non-equilibrium dynamics in many-body quantum systems.\nTh
e first example considers the temporal evolution of a closed\nmany-body-sy
stem represented by a simple molecule being\nexposed to a strong ionizing
light pulse. Solving the\ntime-dependent Schrödinger equation reveals dif
ferent\nprocesses in the charge dynamics following ionization. It\nwill be
demonstrated that a proper choice of electron-hole\nexcitations is crucia
l for capturing the essential physics.\nThe second example features the no
n-equilibrium dynamics of\nan open quantum system. The spin of a magnetic
ad-atom\nresiding on the surface of a non-magnetic substrate is\nexposed t
o the tunneling current of a scanning tunneling\nmicroscope. Spin torque o
f the tunneling electrons induces\nspin-dynamics of the surface spin. A ma
ster-equation\napproach is used to solve von-Neumann's equation of motion\
nfor the reduced density matrix of the surface spin. Challenges\nin comput
ing the short time dynamics of the system by\ndifferent methods are being
exhibited.\n\nhttps://indico.fysik.su.se/event/3987/contributions/4965/
LOCATION:Nordita\, Stockholm FP41
URL:https://indico.fysik.su.se/event/3987/contributions/4965/
END:VEVENT
END:VCALENDAR