二能级原子与单模光场相互作用系统的量子场熵演化特性  

The field entropy evolution of the two level atom interacting with a single mode coherent light field

作　　者：潘营利[1] 王菊霞[1] 

机构地区：[1]渭南师范学院物理与电子工程系,陕西渭南714000

出　　处：《西北师范大学学报（自然科学版）》2008年第4期62-65,共4页Journal of Northwest Normal University(Natural Science)

基　　金：陕西省科技攻关项目(2002K05-G9);渭南师院重点科研基金项目(08YKF014;07YKS021)

摘　　要：利用全量子理论,研究了二能级原子与单模相干态光场相互作用系统的量子场熵演化特性;通过数值计算,讨论了光场的平均光子数-n、光场-原子之间的耦合系数g对量子场熵演化特性的影响.结果表明:量子场熵随时间的演化呈现出周期或非周期性的振荡、崩塌与回复等现象,说明-n、g对量子场熵演化特性的影响具有非线性的特征.The field entropy evolution of two level atom interacting with a single mode coherent light field is studied by means of the complete quantum theory. Through numerical calculation, the influence of the initial mean photon number n, the coupled intensity g and the excited field intensity on the field entropy evolution is investigated. It is found that the field entropy evolution will be the phenomenon of oscillation periodicity and nonperiodicity and collapse-and-revival. The results show that the influence of the initial mean photon number n and the coupled intensity g on the field entropy evolution possess nonlinear properties.

关 键 词：单模光场 二能级原子 相互作用 场熵演化 

分 类 号：O431.2[机械工程—光学工程]