利用全量子理论,研究了Bell态双原子与Pólya态光场相互作用系统的量子纠缠特性,分别讨论了原子初态、最大光子数M、光场参量p和r对系统场熵的影响。结果表明:当最大光子数M足够大时,随着光场参量p和r的逐渐增大,场熵振幅逐渐缩小,场熵演化曲线趋于平稳;与原子初态为|φA(0)〉的情况相比,原子初态为|A(0)〉时,系统的纠缠状态更容易受到光场参量p和r的影响。

The quantum entanglement in a system which is composed of two atoms in Bell state interacting with the Pólya state is studied on the full quantum theory. The influence of the initial state of atoms and different parameters of the light field on the entanglement property is discussed. The result shows that when the maximum photon number M is large enough,with the increase of the light field parameters p and r,the field entropy oscillations gradually show a regularity. The entanglement property of the system for the atoms initially in Bell state|A(0)〉 is more affected by the parameters p and r of the light field than the ones initially in Bell state|φA(0)〉.