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DTSTART;TZID=Europe/Berlin:20240201T121500
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DTSTAMP:20260504T185256
CREATED:20250706T231523Z
LAST-MODIFIED:20250706T231523Z
UID:10000077-1706789700-1706789700@www.trr352.de
SUMMARY:A New Computational Approach for Bridging the Quantum-Classical Divide in Molecular Dynamics
DESCRIPTION:Although many-body quantum simulations have greatly benefited from high-perfor- mance computing facilities\, large molecular systems continue to pose formidable challenges. Mixed quantum-classical models\, such as Born-Oppenheimer molecular dynamics or Ehren- fest dynamics\, have been proposed to overcome the computational costs of fully quantum ap- proaches. However\, current mixed quantum-classical models typically suffer from long- standing consistency issues. In this talk\, we present a fully Hamiltonian theory of quantum- classical dynamics based on a geometric approach and Koopman wave functions. The resul- ting model appears to be the first to ensure a series of consistency properties\, beyond the posi- tivity of quantum and classical densities. We also exploit Lagrangian trajectories to formulate a finite-dimensional closure scheme for numerical implementations\, the “Koopmon method”. Numerical experiments demonstrate that the Koopmon method is able to capture effects beyond Ehrenfest dynamics in both the classical and the quantum sectors.
URL:https://www.trr352.de/event/a-new-computational-approach-for-bridging-the-quantum-classical-divide-in-molecular-dynamics/
LOCATION:Room 5608.02.011 (Seminarraum (M2/M3))\, Boltzmannstr. 3\, Garching b. München\, 85748\, Germany
CATEGORIES:Talks
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DTSTART;TZID=Europe/Berlin:20240226T190000
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DTSTAMP:20260504T185256
CREATED:20250706T231352Z
LAST-MODIFIED:20250904T103429Z
UID:10000076-1708974000-1708974000@www.trr352.de
SUMMARY:Correlation Decay for Finite Lattice Gauge Theories
DESCRIPTION:In the setting of lattice gauge theories with finite (possibly non-Abelian) gauge groups at weak coupling\, we prove exponential decay of correlations for a wide class of gauge invariant functions\, which in particular includes arbitrary functions of Wilson loop observables. Based on joint work with Sky Cao.
URL:https://www.trr352.de/event/correlation-decay-for-finite-lattice-gauge-theories/
LOCATION:Room 5608.02.011 (Seminarraum (M2/M3))\, Boltzmannstr. 3\, Garching b. München\, 85748\, Germany
CATEGORIES:Talks
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