在非旋波近似下,通过采用相干态正交展开的方法,在非旋波近似下对薛定谔猫态光场与V型三能级原子 相互作用系统的量子特性进行了研究。精确求解了V型三能级的能谱,并判断了系统的保真度。 演化问题的结果表明:当原子初态处于基态时,随着初始光场强度的增大,奇相干态和偶相 干态的二阶相干度的振幅减小,且表现出聚束效应与反聚束效应的临界状态。当原子初态处于叠加 态时,随着初始光场强度的增大,奇相干态和偶相干态的二阶相干度的振幅减小,且表现出聚束 效应。当系统耦合系数减小,光场二阶相干度的振荡幅度减小,光场呈现反聚束效应。

Applying the method of coherent states orthogonalization expansion, quantum properties in a system interacting a V type three-level atom with Schr?dinger cat state were studied without rotating wave approximation (RWA). The energy spectrum of the V type three-level atom was calculated precisely, and the fidelity of the system was estimated. When the atom initially is in the ground state, the amplitude of the second order coherence degrees of the odd or even coherent state decreases and the light field shows bunching effect and antibunching effect alternately with the original strength of light field increasing. Similarly, when the atom initially stays in a superposition state, the amplitude of the second order coherence degrees of the odd or even coherent state decreases and the light field shows bunching effect only with the original strength of light field increasing. As the coupling coefficient decreases, the amplitude of the second order coherence degrees decreases and the light field shows antibunching effect.