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DY: Fachverband Dynamik und Statistische Physik

DY 46: Many-body Quantum Dynamics I (joint session DY/TT)

DY 46.3: Vortrag

Donnerstag, 12. März 2026, 10:00–10:15, HÜL/S186

Quantum typicality approach to energy flow between two spin-chain domains at different temperatures — Laurenz Beckemeyer¹, •Markus Kraft¹, Mariel Kempa¹, Dirk Schuricht², and Robin Steinigeweg¹ — ¹University of Osnabrück, Department of Mathematics/Computer Science/Physics,D-49076 Osnabrück, Germany — ²Institute for Theoretical Physics, Utrecht University, 3584CC Utrecht, The Netherlands

We discuss a quantum typicality approach to examine systems composed of two subsystems at different temperatures. While dynamical quantum typicality is usually used to simulate high-temperature dynamics, we also investigate low-temperature dynamics using the method. To test our method, we investigate the energy current between subsystems at different temperatures in various paradigmatic spin-1/2 chains, specifically the XX chain, the critical transverse-field Ising chain, and the XXZ chain. We compare our numerics to existing analytical results and find a convincing agreement for the energy current in the steady state for all considered models and temperatures.

[1] Beckemeyer et al. arXiv:2507.23439

Keywords: Quantum transport; Transport phenomena; Quantum many-body systems; Quantum spin chains; Dynamical quantum typicality