Normally-Ordered Time Evolution Operator for Mass-Varying Harmonic Oscillator and Wigner Function of Squeezed Number State  

Normally-Ordered Time Evolution Operator for Mass-Varying Harmonic Oscillator and Wigner Function of Squeezed Number State

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作  者:唐绪兵 许雪芬 范洪义 

机构地区:[1]School of Mathematic and Physics,Anhui University of Technology [2]Department of Basic Courses,Jiangsu Teachers University of Technology [3]Department of Material Science and Engineering,University of Science and Technology of China

出  处:《Communications in Theoretical Physics》2010年第7期67-72,共6页理论物理通讯(英文版)

基  金:Supported by National Natural Science Foundation of China under Grant No.10874174

摘  要:For investigating dynamic evolution of a mass-varying harmonic oscillator we constitute a ket-bra integrationoperator in coherent state representation and then perform this integral by virtue of the technique of integration withinan ordered product of operators.The normally ordered time evolution operator is thus obtained.We then derive theWigner function of u(t)|n>,where |n> is a Fock state,which exhibits a generalized squeezing,the squeezing effect isrelated to the varying mass with time.

关 键 词:harmonic oscillator Wigner function damping mass-varying 

分 类 号:O411[理学—理论物理]

 

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