Effects of inhomogeneous couplings between atoms and acavity field on entanglement dynamics

doi:10.1088/1674-1056/19/1/010310

Abstract Based on the concept of concurrence, we have investigated the entanglement dynamics of two two-level atoms coupled to a single-mode cavity field with inhomogeneous couplings. We find that, for some initial states, the inhomogeneous couplings not only induce but also enhance the entanglement in the process of its evolution. In addition, considering the intrinsic decoherence proposed by Milburn, we also find that a proper value of inhomogeneous couplings can enhance the stationary entanglement, and as a result, the destructive effect of intrinsic decoherence on entanglement can be moderated by the inhomogeneous couplings.

Keywords: entanglement evolution intrinsic decoherence

Received: 11 May 2009
Revised: 08 June 2009
Accepted manuscript online:

PACS:	03.65.Ud	(Entanglement and quantum nonlocality)
	03.65.Yz	(Decoherence; open systems; quantum statistical methods)
	03.67.Mn	(Entanglement measures, witnesses, and other characterizations)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 10875020).

Cite this article:

Guo Jin-Liang(郭金良), Xia Yan(夏岩), and Song He-Shan(宋鹤山) Effects of inhomogeneous couplings between atoms and acavity field on entanglement dynamics 2010 Chin. Phys. B 19 010310

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