Entanglement of two atoms interacting with a dissipative coherent cavity field without rotating wave approximation

doi:10.1088/1674-1056/19/11/110303

Abstract Considering two identical two-level atoms interacting with a single-model dissipative coherent cavity field without rotating wave approximation, we explore the entanglement dynamics of the two atoms prepared in different states using concurrence. Interestingly, our results show that the entanglement between the two atoms that initially disentangled will come up to a large constant rapidly, and then keeps steady in the following time or always has its maximum when prepared in some special Bell states. The model considered in this study is a good candidate for quantum information processing especially for quantum computation as steady high-degree atomic entanglement resource obtained in dissipative cavity.

Keywords: atomic entanglement Tavis–Cummings model rotating wave approximation characteristic function

Received: 01 August 2009
Revised: 07 June 2010
Accepted manuscript online:

PACS:	03.65.Ud	(Entanglement and quantum nonlocality)
	37.10.Vz	(Mechanical effects of light on atoms, molecules, and ions)
	42.50.Dv	(Quantum state engineering and measurements)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 10374025), the Education Ministry of Hunan Province, China (Grant No. 06A038) and the Natural Science Foundation of Hunan Province, China (Grant No. 07JJ3013).

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Kang Guo-Dong(康国栋), Fang Mao-Fa(方卯发), Ouyang Xi-Cheng(欧阳锡城), and Deng Xiao-Juan(邓小娟) Entanglement of two atoms interacting with a dissipative coherent cavity field without rotating wave approximation 2010 Chin. Phys. B 19 110303

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Entanglement of two atoms interacting with a dissipative coherent cavity field without rotating wave approximation

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