与准Λ型四能级系统互作用光场的熵演化

Entropy evolution of the field interacting with a quasi-Λ-type four-level atom

研究了准Λ型四能级系统与非关联双模相干光场相互作用系统的场熵演化特性 ,讨论了原子初态、平均光子数及能级劈裂对场熵的影响 .该系统包含了二能级原子和三能级原子与单模场相互作用情况 .

The evolution of the field (atomic) entropy in a system of a quasi_Λ_type four level atom interacting with an uncoupled two_mode coherent field is investigated. The effects of initial atomic state, the initial mean photon number and the splitting of the atomic energy levels on the entropy are discussed. The system reduces to that of a two level or three level atom interacting with a single mode coherent field in special cases.