Freiburg 2019 – wissenschaftliches Programm

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FM: Fall Meeting

FM 62: Poster: Open and Complex Quantum Systems

FM 62.1: Poster

Mittwoch, 25. September 2019, 16:30–18:30, Tents

Study of the role of system-environment correlations in quantum open system dynamics — •Rodrigo Gómez and Heinz-Peter Breuer — Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, Hermann-Herder-Str. 3, D-79104 Freiburg, Germany

In open quantum system dynamics, the system can experience decoherence and/or dissipation due to its interaction with the environment, but it can also get correlated and entangled with the environment in complex ways. We studied the role of system-environment correlations in open quantum system dynamics by taking two approaches: (1) Analyzing the case of an exactly solvable atom-field model, studying the dynamics of the correlations in relation to the parameters describing the open system, such as the spectral density of the environment, decay rate, detuning, etc. Distinguishing the cases when the system behaves Markovian and Non-Markovian; (2) Studying the general change of mutual information in open system dynamics.

We show with the first approach (1) that the system-environment correlations seem to be present during the open system dynamics, and that we can reach maximal degree of system-environment correlations even for Markovian dynamics. With the second approach (2), we highlight some entropic relations between the change of mutual information and the open system dynamics.