Atom-photon entanglement in the system with competing k-photon and l-photon transitions

• 来源期刊: 中国物理（英文版）
• 关键词: mode-mode competition system quantum entropy entanglement
• 年，卷（期）: 2007,（7）
• 页码范围: 1971-1975
• 页数: 5页
• 语种: 英文

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(λ/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.