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Open AccessArticle

Influence of the Coupling between Two Qubits in an Open Coherent Cavity: Nonclassical Information via Quasi-Probability Distributions

Department of Mathematics, College of Science and Humanities, Prince Sattam bin Abdulaziz University, Al-Aflaj 11942, Saudi Arabia
Faculty of Science, Assiut University, Assiut 71515, Egypt
Department of Applied Sciences and Mathematics, College of Arts and Sciences, Abu Dhabi University, Abu Dhabi 59911, UAE
Faculty of Science, Al-Azhar University, Nasr City 11884, Egypt
Author to whom correspondence should be addressed.
Entropy 2019, 21(12), 1137;
Received: 25 October 2019 / Revised: 11 November 2019 / Accepted: 16 November 2019 / Published: 21 November 2019
(This article belongs to the Collection Quantum Information)
In this paper, we investigate the dynamics of two coupled two-level systems (or qubits) that are resonantly interacting with a microwave cavity. We examine the effects of the intrinsic decoherence rate and the coupling between the two qubits on the non-classicality of different system partitions via quasi-probability functions. New definitions for the partial Q-function and its Wehrl entropy are used to investigate the information and the quantum coherence of the phase space. The amount of the quantum coherence and non-classicality can be appropriately tuned by suitably adopting the rates of the intrinsic-decoherence and the coupling between the two qubits. The intrinsic decoherence has a pronounced effect on the negativity and the positivity of the Wigner function. The coupling between the two qubits can control the negativity and positivity of the quasi-probability functions. View Full-Text
Keywords: intrinsic decoherence; quasi-probability distributions intrinsic decoherence; quasi-probability distributions
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MDPI and ACS Style

Mohamed, A.-B.A.; Eleuch, H.; Obada, A.-S.F. Influence of the Coupling between Two Qubits in an Open Coherent Cavity: Nonclassical Information via Quasi-Probability Distributions. Entropy 2019, 21, 1137.

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