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TT: Fachverband Tiefe Temperaturen

TT 47: Poster Session Correlated Electrons 2

TT 47.20: Poster

Mittwoch, 18. März 2020, 15:00–19:00, P2/3OG

Higher order auxiliary field quantum Monte Carlo methods — •Florian Goth and Fakher Assaad — Institut für theoretische Physik und Astrophysik, Universität Würzburg, 97074 Würzburg, Germany

The auxiliary field method QMC method has been a workhorse of solid state physics for a long time and has found its most recent implementation in the ALF package. The utilization of the Trotter-Suzuki decomposition to decouple the interaction from the non-interacting Hamiltonian makes this method inherently second order in terms of the imaginary time slice. We show the necessary generalizations to enable higher orders in ALF and perform numerical comparisons with other second order methods as well as methods of higher order.