The master equations of a reduced system densityoperator , by means of the Liouville equation and the projection operators techniques have been derived.
Methods the distance between two different multimode odd coherent state light fields was analyzed theoretically by the method of distance functions of densityoperator.
方法采用两个不同态的密度算符距离函数方法,从理论上研究两个不同多模奇相干态光场之间的距离。
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Using it we can conveniently and simply convert a ME into its corresponding differential equation and from solution of which we can extract the reduced densityoperator.