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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:13 |
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Conference: Bucharest University Faculty of Physics 2015 Meeting
Section: Theoretical Physics and Applied Mathematics
Title:
Generation of Gaussian quantum discord of two coupled bosonic modes in a thermal environment
Authors:
Tatiana MIHAESCU
Affiliation:
Faculty of Physics, University of Bucharest, Bucharest-Magurele, P.O. Box MG-11, Romania
E-mail
mihaescu92tatiana@gmail.com
Keywords:
bosonic modes, Gaussian entropic discord
Abstract:
We give a description of the Gaussian entropic discord for a system consisting of two interacting bosonic modes embedded in a thermal environment, which evolves according to the Markovian master equation obtained in the framework of the theory of open quantum systems based on completely positive dynamical semigroups. For initial uni-modal squeezed states the generation of Gaussian discord takes place, for all non-zero values of the strength of interaction between the coupled bosonic modes. After reaching some maximum value of the Gaussian discord in the case of initial uni-modal squeezed states, and also for initial squeezed thermal states with initial non-zero Gaussian discord, it non-monotonically decreases in time and tends asymptotically for large times to some definite non-zero value. The asymptotic discord strongly depends on the values of the coefficients characterizing the thermal bath (temperature and dissipation constant).
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