Evolution of the entropy of a two-mode field interacting with a casade three-lev el atom system
双模光场与级联三能级原子相互作用系统中熵的演化

Considering the larger detuning approximation and the effect of phase damping of cavity field,we have studied the time evolution of the linear entropies for the atom-field system,the field and the atom in the system of a cascade three-level atom interacting with a two-mode field.The effects of ac Stark shifts and initial states of the cavity field on all the linear entropies are analyzed.