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

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.
Authors:
;  [1]
  1. National Institute of Physics and Nuclear Engineering, P.O. Box MG-6, Bucharest-Magurele (Romania)
Publication Date:
OSTI Identifier:
22390741
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1634; Journal Issue: 1; Conference: TIM-13 Physics Conference, Timisoara (Romania), 21-24 Nov 2013; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BOSONS; EVOLUTION; GAUSS FUNCTION; GEOMETRY; OSCILLATIONS; QUANTUM SYSTEMS