量子力学论文.doc

付静姜广军,付静,袁明霞(长春工程学院,吉林建筑工程学院城建学院长春长春130032130111)摘要:针对带有退相干衰减机制的一轴模型和二轴模型,在薛定谔图象图象下一,,研究了三粒子体系任意时刻的量子态及最大Wigner-:体系在非线性相互作用下,,体系的最大偏振信息始终出现在平面内,,由于退相干衰减的引入,,,。关键词:一轴模型,二轴模型,,最大的退相干,Wigner-Yanse偏振信息中图分类号::AWigner-Yanseskewinformationofthree-qubitsystemJIANGGuang-Jun,FU-JingLIUWan-Fang,YUANMing-XiaZHANGLi-Hua(thecitycollegeofjilinarchitecturalandcivilengineeringinsituteSchoolofPhysicsandEngineering,AnqingTeachersCollege,AnqingChangchun246011130111,China)Abstract:Thedecaymechanismisconsideredintheone-axistwistingmodelandthetwo-countertwistingmodelforthree--Yanseskewinformation(MSI)aregivenfordifferentmodelwithintheSchrö,,inwhichtheMSIcanreachtheextremevalues9/-axistwistingmodelandtheone-axistwistingmodelwithtransversefield,.Theresultsshowthatthefidelityisaperiodicfunctionintheone-,thefidelityisdependentonthevaluesofattimepointof,-axistwistingmodelwithtransversefield,thetransversefieldimprovementsnotonlythespinsqueezing,:one-axistwistingmodel,two-countertwistingmodel,themaximalWigner-Yanseskewinformationtransversefield,fidelity引言1993年,,,提出了一轴模型和二轴模型,,并在海森堡绘景下精确求解,,建立起了自旋压缩的概念。.随后,,这两个模型引起了人们极大的兴趣,,研究表明,,对于带有横场的一轴模型和二轴模型,,有利于提高自旋压缩和量子纠缠。.在二分量的玻色-爱因斯坦凝聚里面,,如果在最佳压缩点上,,快速的地关闭横场,,则自旋压缩能够被存储起来。.对于高自旋粒子体系,,通过一轴模型,,能给出以局部压缩和整体压缩为基础的纠缠判据。.最近,,,只有一轴模型能够在海森堡绘景下精确求解,,但对于少数的粒子体系,,在薛定谔绘景下,,在任意的时刻,量子态的精确求解是可能的。.Wigner-Yanse偏振信息,,密切关系的量子到不确定度关系,,是量子Fisher信息特殊的一类,,在纯态中对应算符的涨落,可以用来查验检验量子纠缠,在纯态中对应算符的涨落。.对于自旋体系,,总的Wigner-Yanse