动态Stark效应对双光子过程中原子和场的动力学行为的影响

采用单模量子化光场和有效二能级的多能级原子组成的模型,研究了动态Stark效应对该系统原子和压缩态光场的双光子过程动力学行为的影响。动态Stark效应将使原子反转Rabi振荡的再生(revival)幅度降低,周期缩短,原子和场的能量交换加快;也有利于光子反聚束效应加强和亚泊松光子统计分布变窄,但却使光场压缩特性减弱,甚至消失。

DYNAMIC STARK EFFECT ON THE DYNAMICAL BEHAVIORS OF ATOM AND FIELD IN TWO-PHOTON PROCESSES

The dynamic Stark effect on the dynamical behaviors of atom and squeezed state field in-two-photon processes is studied by a model consisting of an effective two-level atom with multiple levels and quantized field with single mode. The dynamic Stark effect will cause the decreasing of the revival amplitude and the shortening of the period of the atomic Rabi osoillation of inversion, and the increasing the speed of energy exchange of an atom with the field. This is favorable to the enhancement of the photon antibunching and the narrowing of the Poisson distribution of photons. However, it will make the squeezing of field to decrease, even disappear.