Dresden 2020 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 17: Poster Session Correlated Electrons 1

TT 17.18: Poster

Montag, 16. März 2020, 15:00–19:00, P2/EG

Dynamical Monte Carlo Simulations with Applications in Dipolar Spin Ice and Open Floquet Systems — •Martin Gembe, Jan Attig, and Simon Trebst — Institute for Theoretical Physics, University of Cologne, 50937 Cologne, Germany

Many-body systems subject to a periodic drive have triggered an enormous research interest, as fluctuations induced by this drive can lead to a variety of exotic phenomena such as time crystals or novel topological states. These phenomena are by definition not accessible within ordinary stationary quantum mechanics but require large-scale full dynamic quantum simulations. In this work, we present dynamical Monte Carlo simulations based on the classical single spin flip Metropolis algorithm in order to study such systems out of equilibrium in the classical limit. With this algorithm, we explore the dynamics of emerging magnetic monopoles in dipolar spin ice in an external magnetic AC field, which exhibits a critical speeding up near the monopole liquid-gas transition. Secondly, we study an open Floquet system, in which analytically it is found that rapid periodic oscillations of the couplings drive the system away from criticality.

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