Entanglement of two two-level atoms trapped in coupled cavities with a Kerr medium

doi:10.1088/1674-1056/23/3/034203

Abstract In this paper, the entanglement dynamics of two two-level atoms trapped in coupled cavities with a Kerr medium is investigated. We find that the phenomena of entanglement sudden death (ESD) and entanglement sudden birth (ESB) appear during the evolution process. The influences of initial atomic states, Kerr medium, and cavity–cavity hopping rate on the atom–atom entanglement are discussed. The results obtained by the numerical method show that the atom–atom entanglement is strengthened and even prevented from ESD with increasing cavity–cavity hopping rate and Kerr nonlinearity.

Keywords: entanglement sudden death concurrence coupled cavities Kerr medium

Received: 03 April 2013
Revised: 18 June 2013
Accepted manuscript online:

PACS:	42.50.-p	(Quantum optics)
	03.67.Bg	(Entanglement production and manipulation)

Fund: Project supported by the Major Research Plan of the National Natural Science Foundation of China (Grant No. 91121023), the National Natural Science Foundation of China (Grant Nos. 60978009 and 61378012), the Science and Technology Project of Zhanjiang, China (Grant No. 2011C3103007), and the Science Research Project in Guangdong Medical College, China (Grant No. xk1120).

Corresponding Authors: Zhang Zhi-Ming
E-mail: zmzhang@scnu.edu.cn

Cite this article:

Wu Qin (吴琴), Zhang Zhi-Ming (张智明) Entanglement of two two-level atoms trapped in coupled cavities with a Kerr medium 2014 Chin. Phys. B 23 034203

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Entanglement of two two-level atoms trapped in coupled cavities with a Kerr medium

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