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Chin. Phys. B, 2018, Vol. 27(10): 100201    DOI: 10.1088/1674-1056/27/10/100201
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Some studies of the interaction between two two-level atoms and SU(1, 1) quantum systems

T M El-Shahat, M Kh Ismail
Faculty of Science, Al-Azhar University, Assiut 71524, Egypt
Abstract  

Herein, we present an approach to look for the best phenomenon to measure quantum correlation. The system of two isolated qubits each interacting with a single-mode cavity was theoretically created to study the quantum correlation. Some of the phenomena, such as the quantum discord and concurrence, were generated through such a system. The influences of initial state purity, qubit motion, and detuning parameters were discussed for the phenomena. These parameters for a specific value show that the behavior of phenomena are analogous. It is interesting to mention that some values of detuning undergo a sudden death of phenomena, and the quantum discord still captures the qubits quantum correlation. We predict that the quantum discord may be a better measure of quantum correlation than concurrence.

Keywords:  an isolated atom with a cavity SU(1,1)      quantum discord concurrence  
Received:  24 June 2018      Revised:  25 July 2018      Accepted manuscript online: 
PACS:  02.20.Bb (General structures of groups)  
Corresponding Authors:  M Kh Ismail     E-mail:  momran484@yahoo.com

Cite this article: 

T M El-Shahat, M Kh Ismail Some studies of the interaction between two two-level atoms and SU(1, 1) quantum systems 2018 Chin. Phys. B 27 100201

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