介质的增益和损耗作用对2MQES光场Y压缩的影响  

Influences of the gain and absorption spoilage effect of medium on Y-squeezing of 2MQES light-field

作　　者：薛红[1] 施卫[1] 李望[2] 

机构地区：[1]西安理工大学理学院,陕西西安710048 [2]渭南师范学院物理学系,陕西渭南714000

出　　处：《陕西师范大学学报（自然科学版）》2008年第1期34-37,42,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(2004A19);陕西省教育厅科研基金资助项目(02JK191)

摘　　要：构造了在增益介质和吸收损耗介质中沿Z方向传播强度相等的2MQES(Two state-superposition multimode quantum entanglement state,2MQES)光场.利用多模压缩态理论,对2MQES光场的广义非线性等幂次N次方Y压缩特性进行了研究,并对介质增益和吸收损耗作用对2MQES光场的广义非线性等幂次N次方Y压缩效应的影响进行了详细探讨.结果表明,介质为增益介质时,增益系数jα>0,2MQES光场的广义电场分量和广义磁场分量呈现出N次方Y压缩效应.jα增大,压缩幅度和压缩强度减小;介质为吸收介质时,增益系数jα<0,此时,2MQES光场的广义电场分量和广义磁场分量也呈现出N次方Y压缩效应,但|jα|增大,压缩幅度和压缩强度也随之增大,且吸收越强,压缩幅度和压缩强度越大.这表明吸收介质对压缩更为有利.The 2MQES （or Two state-superposition multimode quantum entanglement state） lightfield｜ψ（2）MF （ aj ）〉q along Z direction spreading in the gain medium and absorption medium is constructed. The multimode squeezed state theory is used to research the effect of the generalized nonlinear equal-power N-power Y-squeezing of 2MQES light-field; the influences of the gain and absorption spoilage effect of medium upon the generalized nonlinear equal-power N-power Y-squeezing of 2MQES light-field are analyzed in detail. It is found that, under the condition of the gain parameter, aj 〉 0, both the generalized electric-field component and the generalized magnetic-field component of state ψ（2）MF（aj） ）q can present a N-power Y-squeezing effect, and when ai is increase, both the squeezed amplitude and the squeezed intensity of the N-power Y-squeezing will diminish. Under the condition of the absorption spoilage coefficient aj 〈 0, both the generalized electric-field component and the generalized magnetic-field component of state ｜ψ（2）MF（ aj ）〉q can present a N-power Y-squeezing effect, while ｜a j｜ is increase, both the squeezed amplitude and the squeezed intensity of the N-power Y-squeezing will increase. When the absorption effect is increasingly strong, both the squeezed amplitude and the squeezed intensity are increasingly big. It is shows that absorption medium is advantageous to squeezing of multimode quantum superposition state light-field.

关 键 词：量子光学 2MQES光场 N次方Y压缩 增益介质 吸收介质 

分 类 号：O431.2[机械工程—光学工程]