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Non-Markovian Quantum Dynamics in a Squeezed Reservoir

by 1,†, 1 and 1,2,*,†
Institut für Theoretische Physik, Technische Universität Dresden, D-01062 Dresden, Germany
Laboratory of Quantum Optics, Department of Physics and Astronomy, University of Turku, FI-20014 Turun Yliopisto, Finland
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editors: Bassano Vacchini, Andrea Smirne and Nina Megier
Entropy 2022, 24(3), 352;
Received: 15 February 2022 / Accepted: 22 February 2022 / Published: 28 February 2022
(This article belongs to the Special Issue Quantum Information Concepts in Open Quantum Systems)
We study non-Markovian dynamics of an open quantum system system interacting with a nonstationary squeezed bosonic reservoir. We derive exact and approximate descriptions for the open system dynamics. Focusing on the spin boson model, we compare exact dynamics with Redfield theory and a quantum optical master equation for both short and long time dynamics and in non-Markovian and Markov regimes. The squeezing of the bath results in asymptotic oscillations in the stationary state, which are captured faithfully by the Redfield master equation in the case of weak coupling. Furthermore, we find that the bath squeezing direction modifies the effective system–environment coupling strength and, thus, the strength of the dissipation. View Full-Text
Keywords: open quantum systems; squeezed states; non-Markovian dynamics open quantum systems; squeezed states; non-Markovian dynamics
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MDPI and ACS Style

Link, V.; Strunz, W.T.; Luoma, K. Non-Markovian Quantum Dynamics in a Squeezed Reservoir. Entropy 2022, 24, 352.

AMA Style

Link V, Strunz WT, Luoma K. Non-Markovian Quantum Dynamics in a Squeezed Reservoir. Entropy. 2022; 24(3):352.

Chicago/Turabian Style

Link, Valentin, Walter T. Strunz, and Kimmo Luoma. 2022. "Non-Markovian Quantum Dynamics in a Squeezed Reservoir" Entropy 24, no. 3: 352.

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