双光子J-C模型中原子和场的熵特性  

Entropies Evolution in Two-photon Jaynes-cummings Model

作　　者：赵杰[1] 代红权[1] 

机构地区：[1]长江大学物理科学与技术学院,湖北荆州434023

出　　处：《长江大学学报（自科版）（上旬）》2008年第4期43-45,共3页JOURNAL OF YANGTZE UNIVERSITY (NATURAL SCIENCE EDITION) SCI ＆ ENG

基　　金：长江大学科研发展基金项目(260A1100)

摘　　要：研究了双光子J-C模型中原子和场线性熵的演化规律,讨论了原子初态对原子和光场线性熵的影响,结果表明,当原子初始处于纯态时,在原子布居回复周期Tr处,原子(场)的线性熵趋近于零;当原子初始处于混态时,在原子布居回复周期Tr处,原子线性熵较大,而场的线性熵接近于零,在t=π/4g和t=3π/4g处,原子的线性熵有极小值,而场的线性熵较大。Entropies evolution in the two-photon Jaynes-cummings model was investigated.The effects of the atomic initial state on two linear entropies were discussed.The results show that atom and field entropies are almost equal to zero during periodic points of atomic population inversion;while atom initial in mixed state,atom entropies is bigger and field entropies are close to zero.During periodic points of atomic population inversion,while t=π/4g and t =3π/4g,atom entropies are close to zero and field entropies are bigger.

关 键 词：双光子J-C模型 线性熵 混态 

分 类 号：O431.1[机械工程—光学工程]