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1·The wave function and probability density are obtained by the creation and annihilation operators of the invariant operator.

通过不变量算子的产生和湮灭算符，得到波函数和几率密度。

2·Therefore interaction Hamitonian of the single mode light field with the medium is proportional to the fourth power of the annihilation operator plus creation operator.

因此，单模光场与此介质相互作用的哈密顿量正比于光场的湮灭算符与产生算符和的四次方。