Entanglement dynamics of a moving multi-photon Jaynes–Cummings model in mixed states

doi:10.1088/1674-1056/20/7/070303

Abstract Using the algebraic dynamical method, the entanglement dynamics of an atom-field bipartite system in a mixed state is investigated. The atomic center-of-mass motion and the field-mode structure are also included in this system. We find that the values of the detuning and the average photon number are larger, the amplitude of the entanglement is smaller, but its period does not increase accordingly. Moreover, with the increase of the field-mode structure parameter and the transition photon number, the amplitude of the entanglement varies slightly while the oscillation becomes more and more fast. Interestingly, a damping evolution of the entanglement appears when both the detuning and the atomic motion are considered simultaneously.

Keywords: algebraic dynamical method entanglement mixed state

Received: 31 October 2010
Revised: 21 March 2011
Accepted manuscript online:

PACS:	03.65.Ud	(Entanglement and quantum nonlocality)
	03.67.Bg	(Entanglement production and manipulation)
	03.67.Mn	(Entanglement measures, witnesses, and other characterizations)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 10704031) and the Fundamental Research Funds for the Central Universities of China (Grant No. lzujbky-2010-75).

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Tan Lei(谭磊), Zhang Yu-Qing(张玉青), and Zhu Zhong-Hua(朱中华) Entanglement dynamics of a moving multi-photon Jaynes–Cummings model in mixed states 2011 Chin. Phys. B 20 070303

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Entanglement dynamics of a moving multi-photon Jaynes–Cummings model in mixed states

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