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Proceedings Paper

Quantum correlations in two-mode Gaussian open quantum systems
Author(s): Aurelian Isar
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Paper Abstract

In the framework of the theory of open systems based on completely positive quantum dynamical semigroups, we give a description of continuous variable quantum entanglement and quantum discord for a system consisting of two non-interacting non-resonant bosonic modes embedded in a thermal environment. We study the time evolution of logarithmic negativity, which characterizes the degree of entanglement, and show that in the case of an entangled initial squeezed thermal state, entanglement suppression takes place for all temperatures of the environment, including zero temperature. We analyze the time evolution of the Gaussian quantum discord, which is a measure of all quantum correlations in the bipartite state, including entanglement, and show that discord decays asymptotically in time under the effect of the thermal bath. We describe also the time evolution of classical correlations.

Paper Details

Date Published: 10 June 2013
PDF: 8 pages
Proc. SPIE 8882, ROMOPTO 2012: Tenth Conference on Optics: Micro- to Nanophotonics III, 888209 (10 June 2013); doi: 10.1117/12.2032344
Show Author Affiliations
Aurelian Isar, Horia Hulubei National Institute of Physics and Nuclear Engineering (Romania)
Academy of Romanian Scientists (Romania)


Published in SPIE Proceedings Vol. 8882:
ROMOPTO 2012: Tenth Conference on Optics: Micro- to Nanophotonics III
Valentin I. Vlad, Editor(s)

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