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

摘要

We have investigated the evolution of the atomic quantum entropy and the entanglement of atom-photon in the system with competing κ-photon and l-photon transitions by means of fully quantum theory, and examined the effects of competing photon numbers (κ 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.