增益与吸收介质中4MFSS光场广义矢势的N次方Y压缩  

The N-th power Y-squeezing of the generalized vector potential of 4MFSS light field in the gain medium absorption medium

作　　者：韩小卫[1] 张信华[1] 

机构地区：[1]西安电子科技大学技术物理学院

出　　处：《陕西师范大学学报（自然科学版）》2008年第4期32-36,共5页Journal of Shaanxi Normal University：Natural Science Edition

基　　金：陕西省科技攻关基金资助项目(2002K05-G9);陕西省自然科学基金资助项目(2004A19,2001SL04);渭南师范学院重点科研基金资助项目(08YKF018)

摘　　要：利用多模压缩态理论,对介质中非对称四态叠加多模泛函叠加态(4 multimode functioncal superposition state,4MFSS)光场|Ψ(fj)>q广义矢势有效场算符广义非线性等幂次N次方Y压缩效应进行了研究.结果表明,在一定条件下,介质中4MFSS光场广义矢势有效场算符呈现出周期性变化的等幂次N次方Y压缩效应;在增益介质中,随着光场传播距离及各单模相干态光场平均光子数、多模相干态光场总平均光子数和光场强度的增大,光场广义矢势有效场算符所呈现的N次方Y压缩效应压缩程度加深,压缩幅度增大,压缩效应增强;在吸收介质中,随着光场传播距离的增大,各单模相干态光场平均光子数及多模相干态光场总平均光子数减小,光场强度减小,广义矢势有效场算符N次方Y压缩效应压缩程度降低,压缩幅度减小,压缩效应减弱.By using multimode squeezing state theory, this paper makes a detailed study of the generalized nonlinear equal-power N-th power Y-squeezing of the generalized vector potential effective field operator of the asymmetry 4MFSS light field ｜ψ（fj）〉q in the medium. It is found that under certain conditions, the generalized vector potential effective field operator of the 4MFSS light field ｜ψ（fj）〉q in the medium shows periodical equal-power N-th power Y- squeezing; in the gain medium, as the light field spreading distance becomes farther, the average photon number and its sum of every mode in different coherent states becomes larger, and the intensity of light field increases, the squeezing extent, range and effect of the N-th power Y- squeezing shown by the generalized vector potential effective field operator of the 4MFSS light field increases; in the absorption medium, as the light field spreading distance becomes farther, the average photon number and its sum of every mode in different coherent states becomes decrease, and the intensity of light field increases, the squeezing extent , range and effect of the N-th power Y-squeezing shown by the generalized vector potential effective field operator of the 4MFSS light field decreases.

关 键 词：量子光学 增益介质 吸收介质 4MFSS光场 广义矢势有效场算符 N次方Y压缩 

分 类 号：O431.2[机械工程—光学工程]