Hannover 2020 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 29: Quantum Effects (Entanglement and Decoherence)
Q 29.6: Talk
Wednesday, March 11, 2020, 12:15–12:30, f442
On open quantum systems in thermal non-ergodic environments — •Carlos Parra-Murillo1, Max Bramberger1, Claudius Hubig2, and Ines de Vega1 — 1Department of Physics and Arnold Sommerfeld Center for Theoretical Physics, Ludwig-Maximilians-University Munich, Germany — 2Max-Planck-Institut für Quantenoptik, Hans-Kopfermannstr. 1, 85748, Garching, Germany
In this work we investigate the failure of the weak coupling approximation standard in open quantum systems when non-Gaussian environments. We show that within this scenario, mainly characterized by non-decaying correlation functions, the derivation of a Lindblad equation is no longer possible, thus preventing the thermalization of the open quantum system while producing highly non-Markovian dynamics. We illustrate our statements by considering a thermal spin-boson environment, and show that non-decaying correlations are connected to a 1/f noise that extends to zero frequencies, providing a framework that agrees with experimental observation.
[1] C. A. Parra-Murillo et al, preprint arXiv:1910.10496