压缩相干态光场两耦合双原子系统的量子场熵  

The quantum field entropy in the system of a squeezed coherent states field interacting with two coupled two-level atoms

作　　者：刘王云[1] 杨志勇[1] 安毓英[1] 韩小卫[2] 

机构地区：[1]西安电子科技大学技术物理学院,陕西西安710071 [2]渭南师范学院量子光学与光子学研究所,陕西渭南714000

出　　处：《陕西师范大学学报（自然科学版）》2008年第3期44-48,共5页Journal of Shaanxi Normal University：Natural Science Edition

基　　金：陕西省自然科学基金资助项目(2001SL04);陕西省科技攻关基金资助项目(2002K05-G9)

摘　　要：应用全量子理论,研究了单模压缩相干态光场和偶极与偶极力关联的两个等同的耦合双能级原子相互作用系统的量子场熵演化特性.通过数值计算,讨论了光场压缩因子、场与原子间耦合强度以及原子间耦合强度对量子场熵演化特性的影响.结果表明,光场的压缩因子影响量子场熵演化的振荡幅度;场与原子间耦合强度系数影响量子场熵演化的周期性;原子之间的耦合强度系数不仅影响量子场熵演化的振荡性,而且影响量子场熵演化的周期性.The properties of quantum field entropy evolution in the system of a single-mode squeezed coherent states field interacting with a pair of identical coupled two-level atoms is studied by utilizing of the complete quantum theory, and the influences of the field squeezing parameter, the coupling strength between the field and the atoms and the coupling strength between the two identical two-level atoms on properties of evolution of quantum field entropy are discussed. The results obtained from the numerical results indicate that the field squeezing parameter influences the amplitude of vibration of the field quantum entropy evolution, the coupling strength between the field and the atoms affects the periodicity of the evolution of the field quantum entropy, while the coupling strength between the two identical two-level atoms influences not only the amplitude of the oscillation of the field quantum entropy evolution but also its periodicity.

关 键 词：量子光学 量子信息学 单模压缩相干态 耦合双能级原子 量子场熵 

分 类 号：O431.2[机械工程—光学工程]