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本文提出一个级联三能级原子与初始处于相干态的辐射场相互作用的量子统计模型。通过使用数值求和及鞍点近似方法,讨论了原子能级算符和光子数平均值的性质,揭示了双光子跃迁、新的衰变及恢复等现象。A quantum-statistical model for a three-level cascade atom interacting with radiation fields initially in coherent states is presented. By means of numerical summation and saddle-point approximation, the expectation values of the atomic-level operators and the photon numbers are obtained and discussed, which reveals the phenomena such -as the twophoton transitions and the new collapse and revival.
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