Entanglement dynamics of two distant atoms in two detuning cavities

doi:10.1088/1674-1056/19/11/110304

Abstract We investigate the entanglement dynamics via the concurrence of two distant atoms interacting off-resonantly with two cavity fields in Fock states, respectively. We find that the evolution of entanglement has sudden death and sudden birth phenomena, that with the increase of photon numbers in the two cavities, the alternate frequency of sudden death and sudden birth turns fast, and that the amplitude of concurrence oscillates regularly with oscillation frequency becoming slow when the cavity fields have the same photon numbers. While, the maximum of concurrence declines and the amplitude of concurrence oscillates irregularly when the two cavity fields have different photon numbers. In addition, we find the length of death time is dependent on the initial entanglement.

Keywords: entanglement dynamics interacting off-resonantly Fock state sudden death and sudden birth

Received: 06 January 2010
Revised: 11 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. 60667001).

Cite this article:

Ji Xin(计新), Lü Tian-Quan(吕天全), and Zhang Shou(张寿) Entanglement dynamics of two distant atoms in two detuning cavities 2010 Chin. Phys. B 19 110304

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