新的奇偶非线性相干态及其非经典性质  

New even and odd nonlinear coherent states and their non-classical properties

作　　者：孟祥国[1] 王继锁[1] 

机构地区：[1]聊城大学物理系,聊城252059

出　　处：《物理学报》2007年第4期2154-2159,共6页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10574060);山东省自然科学基金(批准号:Y2004A09)资助的课题.~~

摘　　要：构造出了一种新的奇偶非线性相干态,并借助于数值计算方法研究了它们的压缩、振幅平方压缩、反聚束和相位概率分布等非经典性质.结果表明,与通常的奇偶相干态和非线性奇偶相干态不同,在参数|λ|的不同取值范围内,新的奇偶非线性相干态在Y1和Y2两个方向均可呈现振幅平方压缩效应,而压缩效应仅在偶非线性相干态的X2方向上呈现,反聚束效应仅在奇非线性相干态中呈现.另外,通过研究新的奇偶非线性相干态相位概率分布,发现新的奇偶非线性相干态具有完全不同的量子干涉特性.A new kind of even and odd nonlinear coherent states （EONLCS） is constructed. Using the numerical computation method, the non-classical properties such as squeezing, amplitude-squared squeezing, anti-bunching and phase probability distribution of the new EONLCS are investigated. The results show that, in the different ranges of the parameter ｜λ｜, the new EONLCS exhibits amplitude-squared squeezing in the directions Y1 and Y2 . The squeezing effect is shown in the direction Xz for new even nonlinear coherent states, and the anti-bunching effect is shown for new odd nonlinear coherent states. Moreover, we find that the new EONLCS exhibit different quantum interference properties by studying the probability distributions of the states.

关 键 词：新的奇偶非线性相干态 压缩效应 反聚束 相位概率分布 

分 类 号：O431.2[机械工程—光学工程]