Non-Markovian Quantum Dynamics in a Squeezed Reservoir

Entropy

Valentin Link¹  Walter T. Strunz¹  Kimmo Luoma¹ 

[1] Institut für Theoretische Physik, Technische Universität Dresden, D-01062 Dresden, Germany;

关键词: open quantum systems;    squeezed states;    non-Markovian dynamics;   

DOI  :  10.3390/e24030352

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown