二能级原子与叠加态光场的高阶压缩

TWO LEVEL ATOM AND HIGH-ORDER SQUEEZING OF SUPERPOSITION STATES

本文提出一个二能级原子与初始处于叠加态的光场相互作用的量子统计模型。通过鞍点近似方法、讨论了原子能级算符和光子数平均值的性质,揭示了衰变及恢复等现象。给出了叠加态高阶压缩随时间的变化规律。

A quantum-statistical model for a two-level atom interacting with optical fields initially in superposition states is presented. By means of the saddle-point approximation, the expectation values of the atomic-level operators and the photon number are obtained and discussed, which reveals the phenomena such as the collapse and revival. Finally, the time-variation of high-order squeezing about superpositon states is given