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TT: Fachverband Tiefe Temperaturen
TT 62: Nonequilibrium Quantum Many-Body Systems II (joint session TT/DY)
TT 62.6: Talk
Wednesday, March 14, 2018, 16:45–17:00, H 3010
Irreversible dynamics in quantum many-body systems — •Markus Schmitt1,2 and Stefan Kehrein1 — 1Institute for Theoretical Physics, Georg-August-Universität Göttingen, Germany — 2Max-Planck-Institute for the Physics of Complex Systems, Dresden, Germany
Irreversibility, despite being a necessary condition for thermalization, still lacks a sound understanding in the context of quantum many-body systems. In our work [1] we approach this question by studying the behavior of generic many-body systems under imperfect effective time reversal, where the imperfection is introduced as a perturbation of the many-body state at the point of time reversal. Based on numerical simulations of the full quantum dynamics we demonstrate that observable echos occurring in this setting decay exponentially with a rate that is intrinsic to the system meaning that the dynamics is effectively irreversible.
M. Schmitt and S. Kehrein, arXiv:1711.00015