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Open AccessArticle

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

1
Department of Mathematics, College of Science and Humanities, Prince Sattam bin Abdulaziz University, Al-Aflaj 11942, Saudi Arabia
2
Faculty of Science, Assiut University, Assiut 71515, Egypt
3
Department of Applied Sciences and Mathematics, College of Arts and Sciences, Abu Dhabi University, Abu Dhabi 59911, UAE
4
Faculty of Science, Al-Azhar University, Nasr City 11884, Egypt
*
Author to whom correspondence should be addressed.
Entropy 2019, 21(12), 1137; https://doi.org/10.3390/e21121137
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. https://doi.org/10.3390/e21121137

AMA Style

Mohamed A-BA, Eleuch H, Obada A-SF. Influence of the Coupling between Two Qubits in an Open Coherent Cavity: Nonclassical Information via Quasi-Probability Distributions. Entropy. 2019; 21(12):1137. https://doi.org/10.3390/e21121137

Chicago/Turabian Style

Mohamed, Abdel-Baset A.; Eleuch, Hichem; Obada, Abdel-Shafy F. 2019. "Influence of the Coupling between Two Qubits in an Open Coherent Cavity: Nonclassical Information via Quasi-Probability Distributions" Entropy 21, no. 12: 1137. https://doi.org/10.3390/e21121137

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