中国物理B ›› 2007, Vol. 16 ›› Issue (7): 1971-1975.doi: 10.1088/1009-1963/16/7/028
方卯发1, 胡要花1, 吴琴2
Wu Qin(吴琴)a)†, Fang Mao-Fa(方卯发)b), and Hu Yao-Hua(胡要花)b)
摘要: We have investigated the evolution of the atomic quantum entropy and the entanglement of atom--photon in the system with competing k-photon and l-photon transitions by means of fully quantum theory, and examined the effects of competing photon numbers (k and l), the relative coupling strength between the atom and the two-mode field (\lambda/g), and the initial photon number of the field on the atomic quantum entropy and the entanglement of atom--photon. The results show that the multiphoton competing transitions or the large relative coupling strength can lead to the strong entanglement between atoms and photons. The maximal atom--photon entanglement can be prepared via the appropriate selection of system parameters and interaction time.
中图分类号: (Strong-field excitation of optical transitions in quantum systems; multiphoton processes; dynamic Stark shift)