有限维Hilbert空间奇偶相干态的方差压缩和熵压缩特性  

The Quadratic Compression and Entropic Compression of Odd and Even Coherent States in a Finite-Dimensional Hilbert Space

作　　者：卢道明[1] 

机构地区：[1]武夷学院电子工程系,福建武夷山354300

出　　处：《四川师范大学学报（自然科学版）》2008年第6期724-727,共4页Journal of Sichuan Normal University（Natural Science）

基　　金：福建省自然科学基金(2008J0217)资助项目

摘　　要：运用数值计算的方法研究了有限维希尔伯特空间奇偶相干态的方差压缩和熵压缩特性,并对两种压缩效应进行了比较,数值计算结果表明:各有限维希尔伯特空间奇相干态均不出现方差压缩,但具有熵压缩效应.各有限维希尔伯特空间偶相干态出现方差压缩时,熵一定出现压缩,熵压缩范围较方差压缩范围大,可见熵更敏感于光场的压缩效应.The quadratic compression and entropie compression of odd and even coherent states （O-E CSs） in a finite-dimensional Hilbert space are studied by numerical calculation method. It is showed that no quadratic compression but entropic compression exists in O-CSs; both quadratic compression and entropic compression exist in E-CSs. The quadratic compression and entropic compression of O-E CSs are compared. If there is the quadratic compression of parity coherent states in each finite-dimensional Hilbert space, there must be the entropic compression. The results show that entropic compression is more sensitive than quadratic compression.

关 键 词：有限维希尔伯特空间 奇偶相干态 方差压缩 熵压缩 

分 类 号：O431.1[机械工程—光学工程]