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Quantum correlations of two qubits beyond entanglement in two lossy cavities linked by a waveguide

Research Abstract

We explore the quantum correlations (QCs) of two non-interacting two-level systems (qubits). Each qubit is embedded in an open cavity, the cavities are linked by an optical fiber and leak photons to the exter- nal environment. The quantum correlations are investigated via three different quantifiers (measurement- induced nonlocality, geometric quantum discord and negativity) under the effects of the coupling of the qubit-cavity and the fiber-cavity interactions as well as the cavity dissipations. It is found that the gen- eration of QCs and their sudden birth and death phenomena, depend not only on the qubit-cavity and fiber-cavity couplings, but also on the initial states. The robustness of the QCs against the cavity dissi- pations can be enhanced in the regime of the ultra-strong cavity-fiber coupling. We convey that it is possible to control the quantum correlations, as well as to reduce the effect of cavity dissipation.

Research Authors
A .-B.A . Mohamed
H.A. Hessian
H. Eleuch
Research Department
Research Journal
Chaos, Solitons and Fractals
Research Pages
109773
Research Publisher
Science direct
Research Rank
1
Research Vol
135
Research Website
https://www.sciencedirect.com/science/article/abs/pii/S0960077920301752
Research Year
2020