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Open AccessArticle

The Entanglement Generation in P T -Symmetric Optical Quadrimer System

1
Quantum Optics and Engineering Division, Institute of Physics, University of Zielona Góra, Prof. Z. Szafrana 4a, 65-516 Zielona Góra, Poland
2
Joint Laboratory of Optics of Palacký University and Institute of Physics of CAS, Faculty of Science, Palacký University, 17. listopadu 12, 771 46 Olomouc, Czech Republic
Symmetry 2019, 11(9), 1110; https://doi.org/10.3390/sym11091110
Received: 12 July 2019 / Revised: 12 August 2019 / Accepted: 29 August 2019 / Published: 3 September 2019
(This article belongs to the Special Issue Quantum Information and Symmetry)
We discuss a model consisting of four single-mode cavities with gain and loss energy in the first and last modes. The cavities are coupled to each other by linear interaction and form a chain. Such a system is described by a non-Hermitian Hamiltonian which, under some conditions, becomes P T -symmetric. We identify the phase-transition point and study the possibility of generation bipartite entanglement (entanglement between all pairs of cavities) in the system. View Full-Text
Keywords: ??-symmetry; entanglement; negativity ??-symmetry; entanglement; negativity
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Kalaga, J.K. The Entanglement Generation in P T -Symmetric Optical Quadrimer System. Symmetry 2019, 11, 1110.

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