耗散腔中Λ型原子与光场Raman相互作用体系的线性熵

为了研究耗散腔中原子与光场Raman相互作用体系中子系统间的熵交换,利用超算符方法通过对系统主方程求解,讨论了光场强度、腔的耗散系数及原子两能级的Stark位移对线性熵的影响.结果表明：光场越强,光场与其它子系统进行熵交换的时间越长|腔耗散系数越大,熵交换时间越短|改变两能级间的Stark位移使原子和场之间的耦合增强,而系统的耗散系数不变,此时,系统的熵交换加快且其稳态值变小.

Linear Entropy of an Atom-field System with Raman Coupling in Dissipation Cavity

For studying the entropy exchange between the subsystems of the interaction system of a atom with the field in a leaking cavity,an exact solution of the master equation that describes the system by using the method of super-operator is obtained.The influences of the intensity of the cavity-field,the dissipative coefficient of the cavity and the Stark shift between two atomic levels on the linear entropy are discussed.The results show that: the more intense the cavity-field is,the longer the persistent time of the exchange of the entropy between the cavity field with other sub-systems is.When the two-level Stark shifts between the atomic levels changes to enhance the coupling between the atom and the cavity field increased and the cavity dissipation coefficient remain unchanged,the entropy of the system speed up the exchange and the steady-state values of the entropy become smaller.