Generation of quantum correlations in Gaussian open systems
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ISAR, Aurelian. Generation of quantum correlations in Gaussian open systems. In: Materials Science and Condensed Matter Physics, Ed. 9, 25-28 septembrie 2018, Chișinău. Chișinău, Republica Moldova: Institutul de Fizică Aplicată, 2018, Ediția 9, p. 56.
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Materials Science and Condensed Matter Physics
Ediția 9, 2018
Conferința "International Conference on Materials Science and Condensed Matter Physics"
9, Chișinău, Moldova, 25-28 septembrie 2018

Generation of quantum correlations in Gaussian open systems

CZU: 530.145+538.945+539.1

Pag. 56-56

Isar Aurelian
 
Horia Hulubei National Institute of Physics and Nuclear Engineering
 
Disponibil în IBN: 15 ianuarie 2019


Rezumat

In the framework of the theory of open systems based on completely positive quantum dynamical semigroups, we analyze the time evolution of continuous variable quantum correlations (quantum entanglement, quantum discord and quantum steering) in a system consisting of two coupled bosonic modes interacting with a thermal reservoir. We solve the Markovian master equation which determines the dynamics of the considered system and describe the quantum correlations in terms of the covariance matrix for Gaussian initial states. Depending on the values of the parameters characterizing the initial state of the system (squeezing parameter, average thermal photon numbers), coefficients describing the interaction of the system with the environment (temperature, dissipation constant), and depending also on the strength of the coupling between the two bosonic modes, one can observe the generation of quantum correlations, their sudden suppression, temporary revivals and suppressions, or an asymptotic decay of quantum correlations in the limit of large times.