中国物理B ›› 2007, Vol. 16 ›› Issue (5): 1344-1350.doi: 10.1088/1009-1963/16/5/030
胡要花, 方卯发, 廖湘萍
Hu Yao-Hua(胡要花), Fang Mao-Fa(方卯发)†, and Liao Xiang-Ping(廖湘萍)
摘要: In a system with a moving V-type three-level atom interacting with the SU(1,1)-related coherent fields, we investigate the entanglement between the moving three-level atom and the SU(1,1)-related coherent fields by using the quantum-reduced entropy, and that between the SU(1,1)-related coherent fields by using the quantum relative entropy of entanglement. It is shown that the two kinds of entanglement are dependent on the atomic motion and exhibit the periodic evolution with a period of 2π/p. The maximal atom--field qutrit entanglement state can be prepared, and the entanglement preservation of the SU(1,1)-related coherent fields can be realized in the interacting process via the appropriate selection of system parameters and interaction time.
中图分类号: (Entanglement and quantum nonlocality)