压缩态初始光场下变耦合系数的Jaynes-Cummings模型

讨论了初始光场为压缩态而且原子一场耦合系数随时间线性变化情形下的Jaynes—Cummings模型。具体研究了原子布居数反转、光场的压缩等随时间的演化性质，讨论了初始光场的压缩系数、压缩相位及耦合系数变化的快慢对这些性质的影响。结果表明，随着光场压缩系数的增大，原子布居数反转的崩塌—回复现象的频率加快，回复值减小，且场中不再出现压缩性。当耦合系数变化较快时会加速崩塌—回复现象。压缩相位增大时，则会减缓崩塌—回复现象的频率，并使回复值减小。

Time-Dependent Atom-Field Coupling Jaynes-Cummings Model under an Initial Squeezed State

The Jaynes-Cummings models with a time-dependent atom-field coupling under the initial squeezed state of the optical field are discussed. Especially, the evolution of the atomic population inversion, and the squeezing properties of the field with time are studied. Further, the effects of the atom-field coupling coefficient, the squeezing parameter and phase on these properties are also discussed, and some results are obtained. With the increasing of squeezing coefficient, the frequency of collapse-revival in atomic population inversion are enhanced, and the amplitude of revival decreases, in the same time, there are no squeezing. When atom-field coupling coefficient changes rapidly, it will fasten the collapse-revival. With the increasing of squeezing phase, it will delay the collapse-revival and decrease the amplitude of revivals.