多模薛定谔猫态光场的高次差压缩效应  

Property of equal-power higher-power difference-squeezing in multimode Schrdinger-cat state light field

作　　者：孙中禹[1] 陈光德[1] 杨志勇[2] 

机构地区：[1]西安交通大学电子与信息工程学院 [2]西安电子科技大学技术物理学院,陕西西安710071

出　　处：《陕西师范大学学报（自然科学版）》2004年第1期36-40,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);陕西省科技攻关计划资助项目(2002K05-G9)

摘　　要：构造了由多模复共轭相干态、多模复共轭虚相干态、多模真空态线性叠加组成的多模叠加薛定谔猫态光场.利用多模压缩态理论,研究了该猫态光场的任意次广义非线性等幂次高次差压缩特性.结果表明,多模叠加薛定谔猫态光场中的真空场对其差压缩特性无直接影响;在一定条件下,该猫态光场的两个正交相位分量可分别呈现出等幂次高次差压缩效应;而在另外的条件下,该猫态光场的两个正交相位分量可同时呈现出等幂次高次差压缩效应,这是一种相悖于海森堡测不准关系的新物理现象.The multimode Schrdinger-cat state light field is constructed that is composed of linear superposition of multimode complex conjugation coherent state, multimode complex conjugation imaginary coherent state and multimode vacuum state. By utilizing the theory of multimode squeezed states, the properties of (generalized) nonlinear equal-power N-th power difference squeezing in the Schrdinger-cat state mentioned above are studied in detail. It is found that (1) the difference squeezing of the multimode cat state light field is (independent) of the vacuum state in the multimode superposition state; (2) when some certain conditions are (satisfied), the two perpendicular phase component of this multimode cat state lightfield can display equal-power higher-power difference squeezing effects respectively, and under some other certain conditions, the equal-power higher-power difference squeezing of the two perpendicular phase component is presented at the same time. This result seems to contradict the Heisenberg uncertainty principle.

关 键 词：等幂次差压缩 三态叠加 多模薛定谔猫态光场 多模真空态 测不准关系 压缩效应 量子光学 

分 类 号：O431.2[机械工程—光学工程]