在阻尼作用下叠加相干态压缩特性的时间演化  

Evolutions of Squeezing of Superposition Coherent States under the Effect of Damping

作　　者：董传华[1] 

机构地区：[1]上海大学物理系,上海200072

出　　处：《量子电子学报》2001年第5期445-450,共6页Chinese Journal of Quantum Electronics

基　　金：中国科学院上海光机所强光开放实验室的有效支持和资助.

摘　　要：本文讨论了由一对相干态｜α＞和｜－α＞而产生的叠加相干态（薛定谔猫态）在具有阻尼的情况下压缩特性随时间的演化，特别讨论了场的高阶压缩性质受阻尼的影响．在场模形成的初始阶段，高阶压缩性质是不稳定的，高阶压缩参量将随时间出现振荡，场态将出现几次压缩和非压缩的交替变化．随时间的推移，场的压缩状态终将趋于稳定，压缩参量的绝对值减小并趋于零．阻尼的增加将加快这一演化过程，并且阻尼将削弱压缩．In the paper, we discussed tile evolution of the squeezing, particularly, the effect of damping on higher-order squeezing in the superposition coherent states (Schrodinger cat states), which are generated by superposing a pair of coherent states |α> and |-α) In the initial stage of the field forming, the higher-order squeezing is unstable, the parameters of higher-order squeezing will be oscillatory along with the time elapsing. The states of the field will be Kth-order squeezing or non-squeezing alternatively and tends to stability at last, the absolute value of squeezing parameter reduces and approaches zero. Increasing damping will speed up the evolution process, damping weakens squeezing.

关 键 词：阻尼 叠加相干态 时间演化 压缩特性 光场 

分 类 号：O43[机械工程—光学工程]