相位损耗腔中大失谐J-C模型双光子过程的线性熵特性  

The properties of linear entropy in the J-C model with large detuning inside a phase cavity in the process of double photons

作　　者：董超[1] 谢芳森[1] 

机构地区：[1]江西师范大学物理与通信电子学院

出　　处：《激光杂志》2004年第4期48-50,共3页Laser Journal

基　　金：江西省自然科学基金项目 (编号 :0 3 12 0 17)

摘　　要：研究相位损耗腔中大失谐下两个全同二能级原子与相干态场相互作用系统中熵的演化 ,讨论了不同原子初始状态、光场平均光子数以及衰变常数对光场线性熵 ,原子线性熵和光场 -原子系统线性熵的影响。结果表明 :光场线性熵和原子的线性熵的演化都较强地依赖于原子初始状态和衰变常数 ,而系统线性熵的演化与原子初始状态无关。随着光场平均光子数的增大 ,线性熵增大 ;随着衰变常数的增大 ,光场和系统的线性熵达到稳定值的时间缩短 。The evolution of the linear entropies of the field,atoms and field-atoms coupling system in the system of two completely identical two-level atoms inside a phase-damping cavity interacting with a coherent field under large detuning are investigated.The effects of atomic initial state,the mean photon number of the field and the dissipation coefficient on the above linear entropies are discussed.The results show that the linear entropies of both the field and the atom are strongly dependent on the atomic initial state,but the evolution of the linear entropy of the system is independent of the atomic initial preparation.With the increasing of the mean photon number,the linear entropies of field,atoms and field-atoms increase;And the larger the dissipation,the more rapid the linear entropies of the field and system tend to the certain degree of mixture,but the linear entropies of atoms don't vary with the dissipation coefficient.

关 键 词：相位损耗 相干态 线性熵 

分 类 号：O431.1[机械工程—光学工程]