由奇偶相干态组成的两种四态叠加多模叠加态光场的等阶N次方Y压缩  

Equal-order N-Th power H-squeezing Four-state Superimposition Multimode Superimposition Light Fild State Composed by Odd Coherent and Even Coherent State Light Fidld

作　　者：李英[1] 陈永庄[1] 刘宝盈[1] 杨志勇[2] 许定国[3] 

机构地区：[1]商洛师范专科学校量子光学与量子信息研究所,物理系陕西商州726000 [2]西北大学光子学与光子技术研究所 [3]西安电子科技大学技术物理学院,西安710068

出　　处：《商洛师范专科学校学报》2002年第2期1-6,共6页Journal of Shangluo Teachers College

基　　金：陕西省自然科学基金(2000SL10);陕西省教育厅专项科研基金(00JK115);西北大学科学基金(批准号:99NW38)资助项目

摘　　要：用不同的多模奇偶相干态光场构造了两种不同的四态叠加多模叠加态光场|ψoe（4）,Ⅵ>q和态|ψoe（4）,Ⅶ>q利用多模压缩态理论研究了态|ψoe（4）,Ⅵ>q和态|ψoe（4）,Ⅶ>q的等阶N次方Y压缩特性.结果发现:1.在相同的条件下态|ψoe（4）,Ⅵ>q和态|ψoe（4）,Ⅶ>q具有相同的等阶N次方Y压缩特征,即它们之间存在压缩简并现象.2.当压缩阶数N为偶数时,a.若Nj（?）=±k（?）π（k（?）=1,2,3,…）时,两态恒处于等阶N-Y最小测不准态;b.若N（?）j=±k（?）π+π/2（k（?）=1,2,3,…）时,这两态可呈现“半相干态”效应;3.当N为奇数时,在相同的条件下,这两态可呈现以下几种效应:a.第一正交分量可呈现等阶N次方Y压缩效应;b.第二正交分量可呈现等阶N次方Y压缩效应;c.可处于等阶N—Y最小测不准态;d.可呈现“半相干态”效应.The two different four-state superimposition multi-mode superimposition state light fields | Ψoe(4), Ⅵ >,and |Ψoe(4), Ⅶ>q are constiuted by multi-mode differnt odd and even coherent state light fields.By using Multi-mode squeezed state theory ,the properties of the equal-order N-th power Y-squeezing of states |Ψoe(4), Ⅵ>q and|Ψoe(4), Ⅶ>q are studied.They are found that:1)Under the same conditions,the states | Ψoe(4), Ⅵ>q and | Ψoe(4), Ⅶ>q present alike N-th power Y-squeezing i.e.make known degenerate squeezing exist in state |Ψoe(4), Ⅵ>q and state |Ψoe(4), Ⅶ>q.2)When the squeezing order N is even number:a.when N(?)j=±kπ, ((k=0,1,2,…)the states present equal-order N-Y minimum uncertainty state;b.when N(?)j=±kπ+π/2((k(?)=0, 1,2,…)the states present 'half coherent state'.3)Whe N is odd number the states present the following effects: a) The first quadratuer components of the states present equal-order N-th power Y-squeezing effect; b) The second quadrature components of the states persent equal-order N-th power Y-squeezing effect; c) The states present equal-order N-Y minimum uncertainty state; d) The states presents 'half coherent state' effeot.

关 键 词：相干态 等价N次方Y压缩 等阶N-Y最小测不准态 “半相干态”效应 压缩简并 四态叠加多模叠加态 光物 量子光学 

分 类 号：O431.2[机械工程—光学工程]