Entanglement dynamics of a double two-photon Jaynes－Cummings model with Kerr-like medium

doi:10.1088/1674-1056/19/3/030309

Abstract In this paper, the entanglement dynamics of a double two-photon Jaynes--Cummings model with Kerr-like medium is investigated. It is shown that initial entanglement has an interesting subsequent time evolution, including the so-called entanglement sudden death effect. It is also shown analytically that the Kerr-like medium can repress entanglement sudden death and enhance the degree of atom--atom entanglement. A more interesting fact is that the Kerr effect is more obvious when each of the two cavities with have the Kerr-like medium than only one of them with the Kerr-like medium.

Keywords: entanglement sudden death concurrence two-photon Jaynes--Cummings model Kerr-like medium

Received: 19 July 2009
Revised: 11 August 2009
Accepted manuscript online:

PACS:	42.50.Dv	(Quantum state engineering and measurements)
	42.65.Hw	(Phase conjugation; photorefractive and Kerr effects)

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

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Ouyang Xi-Cheng(欧阳锡城), Fang Mao-Fa(方卯发), Kang Guo-Dong(康国栋), Deng Xiao-Juan(邓小娟), and Huang Li-Yuan(黄利元) Entanglement dynamics of a double two-photon Jaynes－Cummings model with Kerr-like medium 2010 Chin. Phys. B 19 030309

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Entanglement dynamics of a double two-photon Jaynes－Cummings model with Kerr-like medium

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