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Abstract

Considering a double J-C model with intensity-dependent coupling, we have studied the effects of the intensity-dependent coupling, the mean photon numbers and the atomic motion, on the entanglement and quantum discord between the two two-level atoms when the moving atoms are initially in a maximally entangled state and the fields are in the single-mode thermal fields. The results show that, the entanglement and quantum discord disappear and revive periodically, and can have up to their starting values after revival. A rise in cavity temperature accelerates the death of the entanglement and quantum discord. In addition, the field-mode structural parameter has a strong effect on the entanglement and quantum discord in the system. When the field-mode structural parameter takes a suitable value, the entanglement and quantum discord of the two atoms can be kept from start to finish.

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Funds:Project supported by the National Natural Science Foundation of China (Grant No. 10905028), the NSFC-Henan Talent Development Joint Fund (Grant No. U1204616), and the Program for the Fundamental and Frontier Technology Research of Henan Province, China (Grant No. 102300410050)

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Vol. 62, Issue 7 - 2013-04-05

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