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X-ORIGINAL-URL:https://ktfa.science.upjs.sk/
X-WR-CALNAME:Department of Theoretical Physics and Astrophysics
X-WR-CALDESC:Pavol Jozef Šafárik University in Košice
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BEGIN:VEVENT
CLASS:PUBLIC
UID:MEC-39bfbb2db6ddac3c2ded4a3e07e54102@ktfa.science.upjs.sk
DTSTART:20190715T083000Z
DTEND:20190715T213000Z
DTSTAMP:20200205T183500Z
CREATED:20200205
LAST-MODIFIED:20200205
PRIORITY:5
TRANSP:OPAQUE
SUMMARY:Quantum Monte Carlo many-body methods: introduction and recent progress
DESCRIPTION:Lubos Mitas\nNorth Carolina State University, USA\nI will present a short introduction into the electronic structure quantum Monte Carlo (QMC) based on sampling of particles coordinates. These methods typically employ fixed-node approximations to deal with the fermion signs. I will show  examples of current such calculations that encompass strongly correlated systems, molecules, ultracold atomi condensates, etc, together with insights into biases generated by the fixed nodes in general. So far, however, such QMC calculations have been limited to static,  collinear treatment of electronic spins. Recently, we have developed QMC with variable  spins for calculations that involve spin-orbit or other spin-dependent Hamiltonians and employs generalization of the fixed-node method called fixed-phase. Lastly, I will briefly talk about the nodes of eigenstates due to their both fundamental and practical implications for the fixed-node/phase methods.\nhost: Martin Gmitra\n
URL:https://ktfa.science.upjs.sk/events/quantum-monte-carlo-many-body-methods-introduction-and-recent-progress/
CATEGORIES:KTFA seminar
LOCATION:Institute of Physics, Park Angelinum 9, Košice
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