Squeezing in Representation by Quadratic Combinations of Canonical Operators  

作　　者：FANHong-Yi A.Wuensche 

机构地区：[1]DepartmentofAppliedPhysics,ShanghaiJiaoTongUniversity,Shanghai200030,China DepartmentofmaterialScienceandEngineering,universirtyofScienceandTechnologyofChina,Hefei230026,China [2]InstitutefuerPhysik,Humboldt-Universitaet,Invalidenstr,110,10115BerlinGermany

出　　处：《Communications in Theoretical Physics》2003年第6期717-722,共6页理论物理通讯（英文版）

基　　金：国家自然科学基金

摘　　要：The technique of integration within an ordered product of operators and the coherent-state representation are used to convert exponential operators of basis operators (P<SUP>2</SUP>, Q<SUP>2</SUP>, PQ + QP) to those of the basis operators (a<SUP>2</SUP>, a<SUP>?2</SUP>, a<SUP>?</SUP>a). The coherent state representation of unitary squeezing operators in the factorized form and their normal product form are thus derived. The squeezing engendered by operators of the general form is also obtained.

关 键 词：time-dependent squeezing canonical operators symplectic group integration within ordered products inner automorphism of SU(1 1) group 

分 类 号：O413.4[理学—理论物理]