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SUMMARY:Rubem Mondaini (Beijing Computational Science Research Center)
DTSTART:20210628T160000Z
DTEND:20210628T170000Z
DTSTAMP:20260423T024725Z
UID:QM3/45
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/QM3/45/">Qua
 ntum Critical Points and the Sign Problem</a>\nby Rubem Mondaini (Beijing 
 Computational Science Research Center) as part of Quantum Matter meets Mat
 hs (IST\, Lisbon)\n\n\nAbstract\nThe "sign problem" (SP) is the fundamenta
 l limitation to simulations of strongly correlated materials in condensed 
 matter physics\, solving quantum chromodynamics at finite baryon density\,
  and computational studies of nuclear matter. It is often argued that the 
 SP is not intrinsic to the physics of particular Hamiltonians\, since the 
 details of how it onsets\, and its eventual occurrence\, can be altered by
  the choice of algorithm or many-particle basis. Despite that\, I plan to 
 show in this talk that the SP in determinant quantum Monte Carlo (DQMC) is
  quantitatively linked to quantum critical behavior. This demonstration is
  done via simulations of a number of fundamental models of condensed matte
 r physics\, all of whose critical properties are relatively well understoo
 d.\n
LOCATION:https://researchseminars.org/talk/QM3/45/
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