Open Systems & Information Dynamics

Dynamic Correlations in Open Quantum Systems: The Dephasing Model

V. V. Ignatyuk

Published Jun 1, 2020• 0 citations

Abstract

We study the dynamical correlations in open quantum systems on an example of an exactly solvable dephasing model. The system of non-Markovian kinetic equations for the generalized coherence and quasi-temperature is derived up to the 2-nd order in the coupling constant using the generalized quantum master equation [20]. Numerical and analytical solutions of the kinetic equations are obtained. The analytical result shows a redistribution of the real and imaginary parts of the coherence as compared to the exact one. We give a physical interpretation to the quasi-temperature, relating it to the nonequilibrium kinetic energy of the environment.

DOI: 10.1142/s1230161220500079

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