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DTSTAMP:20210916T132528Z
LOCATION:Lise Girardin
DTSTART;TZID=Europe/Stockholm:20210705T153000
DTEND;TZID=Europe/Stockholm:20210705T173000
UID:submissions.pasc-conference.org_PASC21_sess117@linklings.com
SUMMARY:Time Dependent Superfluid Density Functional Theory and Supercompu
 ting: Latest Developments and Challenges
DESCRIPTION:Minisymposium\n\nSuperfluidity is a generic feature of many qu
 antum systems at low temperatures. It has been experimentally confirmed in
  condensed matter systems like 3He and 4He liquids, in nuclear systems inc
 luding nuclei and neutron stars, in both fermionic and bosonic cold atoms 
 in traps. Superfluids exhibit fascinating dynamical properties. Presently 
 the dynamics can be modelled microscopically via a framework based on the 
 time-dependent density functional theory (TDDFT). The superfluid-TDDFT is 
 applicable to a wide range of physical processes involving superfluidity i
 ncluding simulations of nuclear reactions (fission/fusion), modeling the s
 uperfluid interior of neutron stars, and dynamics of ultracold atomic gase
 s (quantum turbulence, dynamics of topological excitations). Since superfl
 uidity is an emergent phenomenon, a large number of quantum particles are 
 needed in order to simulate it correctly. It sets high numerical and techn
 ical demands for evaluating superfluid-TDDFT with classical computers. Thi
 s minisymposium will present the most relevant applications of the TDDFT f
 ramework achieved with the help of computer systems like Summit (ORNL, USA
 ) and Piz Daint (CSCS, Switzerland) together with the presently utilized n
 umerical and technical solutions. Challenges for future exascale systems i
 n the context of modelling superfluidity/superconductivity will be also hi
 ghlighted.\n\nSuperfluid Dynamics in the Neutron Star Crust\n\nSekizawa, B
 ulgac, Wlazłowski, Magierski, Roche\n\nI will describe efforts relate
 d to studies of superfluid dynamics in the neutron star crust and its rela
 tion to the phenomenon known as neutron star glitch, whose mechanism is st
 ill an unsolved debatable problem in nuclear astrophysics. It has been sug
 gested, more than 40 years ago, that glitches ma...\n\n-------------------
 --\nExotic Features of Superfluidity in Ultracold Atomic Gases\n\nMagiersk
 i\n\nI will present results of applications of TDDFT to model superfluid d
 ynamics in ultracold atomic gases. Recent experimental achievements in tra
 pping and cooling atomic gases provided a playground to study with great p
 recision various exotic features of superfluidity far from equilibrium. Th
 eoretical...\n\n---------------------\nNuclear Fission Dynamics and Collis
 ions of Heavy Ions in Real Time\n\nBulgac\n\nI will discuss the basic fram
 ework and the applications of the superfluid extension of TDDFT to the mic
 roscopic description of nuclear fission and other nuclear reactions, which
  is one of the most complex quantum many-body phenomena.  Nuclear fission,
  in spite of been experimentally discovered more ...\n\n------------------
 ---\n​Programming the Superfluid DFT on Leadership-Class Supercomput
 ers\n\nRoche, Bulgac, Magierski, Sekizawa, Wlazlowski\n\nDeveloping or mig
 rating application codes to effectively utilize peta- and exa- scale compu
 ter architectures poses interesting and difficult challenges to programmer
 s. A specific example is preparing codes for accelerator-based hybrid arch
 itectures. Here, despite software tools that aim to simplify ...\n\n\nDoma
 in: CS and Math, Physics
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