四态叠加多模叠加态光场中广义磁场的N次方H压缩  

Equal-order N-th order H-squeezing of generalized magnetic field component in multi-mode superposition state light field Ψ_e^(4),Ⅲ>_q

作　　者：许定国[1] 安毓英[1] 夏聪玲[2] 

机构地区：[1]西安电子科技大学技术物理学院,陕西西安710071 [2]西北大学物理学系,陕西西安710069

出　　处：《陕西师范大学学报（自然科学版）》2003年第2期55-59,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);陕西省教育厅专项科研基金资助项目(00JK115)

摘　　要：构造了由多模偶相干态与多模虚偶相干态线性叠加组成的一种新型四态叠加多模叠加态光场Ψ(4)e,Ⅲ〉q中广e,Ⅲ〉q,利用多模压缩态理论,研究了态Ψ(4)义磁场分量的等幂次N次方H压缩特性.结果表明,当腔模总数q与压缩次数N的乘积qN=4m(m=1,2,3,…)时,态Ψ(4)e,Ⅲ〉q的广义磁场分量可恒处于等幂次N H最小测不准态;当qN=4m′+2(m′=0,1,2,3,…)时,若态间的初始相位差(θ1-θ2)、各模初始相位和∑qR2j分别满足一定取值φj及各模平均光子数之和∑qj=1j=1条件,态Ψ(4)e,Ⅲ〉q的广义磁场分量可呈现周期性等幂次N次方H压缩效应.A new type of fourstate superposition multimode superposition light field Ψ(4)e,Ⅲ>q is composed by the multimode even and imaginaryeven coherent state light field in this paper.The properties of the equalorder Nth order Hsqueezing of the generalized magnetic field component in state Ψ(4)e,Ⅲ>q are studied in detail by using multimode squeezed state theory.It is found: (1) When the product of cavity order sum q and squeezing order N, qN=4m(m=1,2,3,...) or qN=4m′+2(m′=0,1,2,3,...) with the other conditions correspondence, the generalized magnetic field of the state Ψ(4)e,Ⅲ>q presents equalorder NH minimum uncertainty state. (2) when qN=4m′+2(m′=0, 1, 2, 3, ...), the sum of the initial phase of each vertical order ∑qj=1φj,and the phase difference (θ1-θ2) between states and the sum of the average value of photon numbers of each vertical order ∑qj=1R2i,take different fixed value,the generalized magnetic field of the state ∑qj=1φj presents the equalorder Nth order H squeezing effect in periodical.

关 键 词：量子光学 四态叠加多模叠加态光场 广义磁场 N次方H压缩 等幂次N-H最小测不准态 

分 类 号：O431.2[机械工程—光学工程]