混合态二能级原子双光子过程的量子特性

Quantum Properties in the Two-photon Process with Two-level Atomic Mixed-state

采用时间演化算符方法研究了相干光场与混合二能级原子双光子过程的粒子数反转和光子统计演化行为，结果表明：量子崩塌与复苏性质和原子初始的混合程度无关，但振荡最大幅值受原子初始混合程度的支配，随着原子初始混合程度的增大，原子反转几率减小。

 The properties of the atomic particle number inversion and statistical evolution behavior of the mean photon number in the twophoton process with twolevel atomic mixed-state are studied by means of the timeevolution operator method. The results show that the quantum collapse and revival properties do not depend on while the amplitude of the revival maxima do depend on the mixing extent of the atomic initial state. The probability of the atomic partical number inversion will become smaller as the mixing extent of the atomic initial state is geting larger.