K模辅射场与二能级原子作用系统中场熵的演化  

Entropy evolution of the field in the system of a ttwo-level atom interacting with k-mode radiation field

作　　者：卢道明[1] 

机构地区：[1]武夷学院电子工程系,武夷山354300

出　　处：《原子与分子物理学报》2010年第1期113-116,共4页Journal of Atomic and Molecular Physics

基　　金：福建省自然科学基金(2008J0217);福建省新建本科高校新世纪优秀人才支持计划项目

摘　　要：利用时间演化算符方法研究了K模相干光场与二能级原子相互作用系统中系统态矢的演化.利用数值计算方法研究了三模相干光场与二能级原子相互作用系统中场熵的演化,讨论了初始光场强度对场熵演化的影响.结果表明:当初始光场较强时,场熵随时间的演化呈现出规则的振荡,光场与原子之间的相互作用主要表现为双光子跃迁过程.By means of the time-evolution operator method, the evolution of state vector in the system of a two-level atom interacting with k-mode radiation field is studied. By means of the numerical calculation, the entropy evolution of the field in interacting of a two-level-atom with three-mode coherent state light field is studied. The influences of the initial mean photon number of field on entropy evolution of the field are discussed. The results indicate that the entropy evolution of the field displays regular oscillation behavior and is in agreement with that of two-photon transition process when the initial mean photon number is large.

关 键 词：K模辅射场 二能级原子 相干态 场熵演化 

分 类 号：O431.2[机械工程—光学工程]