Gaussian geometric discord of two-mode systems in a thermal environment

Journal Article · Mon Nov 24 04:00:00 EST 2014 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4903014· OSTI ID:22390741

Suciu, Serban; Isar, Aurelian ^[1]

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1. National Institute of Physics and Nuclear Engineering, P.O. Box MG-6, Bucharest-Magurele (Romania)

In the framework of the theory of open systems based on completely positive quantum dynamical semigroups, we give a description of the Gaussian geometric discord for a system consisting of two non-interacting non-resonant bosonic modes embedded in a thermal environment. We take as initial state of the system a two-mode squeezed thermal state and describe the time evolution of the Gaussian geometric discord under the influence of the thermal bath. By tracing the distance between the state of the considered subsystem and the closest classical-quantum Gaussian state we evaluate the Gaussian geometric discord for all times and temperatures. The geometric discord has finite values between 0 and 1 and decreases asymptotically to zero at large times and temperatures with oscillations on the time axis.

• OSTI ID: 22390741
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1634; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BOSONS
EVOLUTION
GAUSS FUNCTION
GEOMETRY
OSCILLATIONS
QUANTUM SYSTEMS