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Open AccessArticle

Asymmetry of Quantum Correlations Decay in Nonlinear Bosonic System

Nonlinear Optics Division, Faculty of Physics, Adam Mickiewicz University, Uniwersytetu Poznańskiego 2, 61-614 Poznań, Poland
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Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Symmetry 2019, 11(8), 1023; https://doi.org/10.3390/sym11081023
Received: 12 July 2019 / Revised: 4 August 2019 / Accepted: 6 August 2019 / Published: 8 August 2019
(This article belongs to the Special Issue Quantum Information and Symmetry)
We study the problem of the influence of one-sided different noisy channels to the quantum correlations decay in a symmetric bosonic system. We concentrate on one type of these correlations—the entanglement. The system under consideration is composed of two nonlinear oscillators coupled by two-boson interactions and externally driven by a continuous coherent field. Our low-dimensional system can be treated as 2-qutrit one. Two different noisy channels (the amplitude and the phase-damping reservoirs) are applied to both of the system’s modes. We show that there is a noticeable difference in the quantum entanglement in 2-qubit subspaces of the whole system decrease after swapping the reservoirs between the modes of the considered symmetric system. It appears also that the degree of obtained entanglement depends crucially on the position of the appropriate type of reservoir. The origin of the observed asymmetry is also explained. View Full-Text
Keywords: nonlinear oscillator; quantum entanglement; open system nonlinear oscillator; quantum entanglement; open system
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Kowalewska-Kudłaszyk, A.; Chimczak, G. Asymmetry of Quantum Correlations Decay in Nonlinear Bosonic System. Symmetry 2019, 11, 1023.

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