与Glauber-Lachs态相互作用的双原子间的纠缠演化

Entanglement of Two Atoms Interacting with the Glauber-Lachs State

利用全量子理论,对伴随多光子跃迁时与Glauber-Lachs态相互作用的两个原子间的纠缠特性进行了研究,主要讨论了相干平均光子数、热平均光子数和跃迁光子数对系统中原子间的纠缠特性的影响。结果表明:系统中原子间的纠缠度是相干平均光子数的非单调函数;随着热平均光子数和跃迁光子数的增加,系统中原子间的纠缠度有减小的趋势,伴随双光子跃迁时系统中原子间的纠缠度随时间的演化呈现周期性。

With the multi-photo transition,the entanglement properties of two atoms interacting with the Glauber-Lachs state are studied by means of the full quantum theory.The influences of the mean number of the coherent photons,the mean number of the thermal photons and the number of the transition photons on the entanglement properties of the atoms in the system are discussed.The results indicate that the entanglement is a non-monotonic function of the mean number of coherent photons.With the increasing of the mean number of the thermal photons and the number of the transition photons,the entanglement degree of the atoms is decreased.As the Two-photon transition,the time evolution of the entanglement degree of the atoms in the system appears periodic change.