相干态表象在量子相空间分布函数中的应用  

The Applications of Coherent State Representation on the Distribution Functions of the Quantum Phase Space

作　　者：王帅[1] 

机构地区：[1]菏泽学院物理系,山东菏泽274015

出　　处：《量子光学学报》2009年第2期101-105,共5页Journal of Quantum Optics

基　　金：菏泽学院自然科学基金资助项目(XY07WL01)

摘　　要：利用相干态表象和IWOP技术导出了自由热态密度矩阵的正规乘积形式,进而根据相干态表象下的Wigner函数定义重构了自由热态和热相干态的Wigner函数。结果表明利用相干态表象下的Wigner函数定义和算符的正规乘积形式可以方便简捷重构一些量子态的Wigner函数。By means of the coherent state representation and the IWOP technique, the density matrix of free thermal state can be written as normal product form. And then the Wigner function of free thermal state and the thermal coherent state are reproduced by using the wigner function in coherent state representation. It is found that it is easy to obtain the Wigner function of some quantum states by using the Wigner function defined in terms of the coherent state and the normal product form of operators.

关 键 词：量子光学 WIGNER分布函数 IWOP技术 正规乘积 密度矩阵 

分 类 号：O431[机械工程—光学工程]