Regensburg 2025 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 37: Correlated Electrons: Poster
TT 37.29: Poster
Wednesday, March 19, 2025, 15:00–18:00, P4
Stochastic Simulation of Spin Transport — •Franz Pöschl1,4, Xin Zhang1,2,3, Aristo Kevin Ardyaneira P1,2,3, and Peter Rabl1,2,3 — 1Technical University of Munich, TUM School of Natural Sciences, Physics Department, 85748 Garching, Germany — 2Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany — 3Munich Center for Quantum Science and Technology (MCQST), 80799 Munich, Germany — 4Ludwig-Maximilians Universität München, Fakultät für Physik, Geschwister-Scholl-Platz 1, 80539 München
Simulating out of equilibrium steady states of large systems is a hard task. It is therefore necessary to develop novel approaches permitting to simulate the dynamics of those systems efficiently. In our work, we use the Discrete Truncated Wigner Approximation which is a semiclassical approach mapping hamiltonians and dissipative processes into a classical phase space. This mapping allows to compute stochastic trajectories and to evaluate the evolution of the system. In this poster I will present this method and show how it can be employed to study the out-of-equilibrium phases of the XXZ spin model and to derive its transport properties.
Keywords: Spin systems; Non-equilibrium; stochastic simulation; truncated Wigner approximation; spin transport