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SM ISO690:2012 ISAR, Aurelian. Generation of quantum correlations in two-mode Gaussian open quantum systems. In: Materials Science and Condensed Matter Physics, Ed. 8-th Edition, 12-16 septembrie 2016, Chişinău. Chişinău: Institutul de Fizică Aplicată, 2016, Editia 8, pp. 36-37. ISBN 978-9975-9787-1-2. |
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Materials Science and Condensed Matter Physics Editia 8, 2016 |
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Conferința "International Conference on Materials Science and Condensed Matter Physics" 8-th Edition, Chişinău, Moldova, 12-16 septembrie 2016 | |||||
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Pag. 36-37 | |||||
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In the framework of the theory of open systems based on completely positive quantum dynamical semigroups, we make a comparison of the behaviour of continuous variable quantum correlations (quantum entanglement, entropic quantum discord, geometric quantum discord, quantum steering) for a system consisting of: 1) two non-coupled; 2) two coupled bosonic modes embedded in a thermal environment. We solve the Kossakowski-Lindblad Markovian master equation for the time evolution of the considered system and describe the quantum entanglement, discord and steering in terms of the covariance matrix for Gaussian input states. Depending on the values of the parameters characterizing the initial state of the system (squeezing parameter, average photon numbers), the coefficients describing the interaction of the system with the reservoir (temperature, dissipation constant), and on the intensity of the interaction between the two modes, one may notice generation of quantum correlations, their suppression (sudden death), revival and suppression, or an asymptotic decay in time of quantum correlations. We describe also the time evolution of the classical correlations and quantum mutual information, which measures the total correlations of the quantum system. |
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