两纠缠二能级原子在真空场中的纠缠动力学

Entanglement dynamics of two entangled two-level atoms in the vacuum field

研究了两个部分纠缠二能级原子与单模真空场相互作用的纠缠动力学.利用量子约化熵研究了两部分纠缠二能级原子与单模真空场之间的纠缠动力学;利用量子相对熵研究了两部分纠缠二能级原子之间的纠缠动力学;讨论了原子偶极-偶极相互作用对系统纠缠动力学的影响。结果表明:系统呈现出周期性的纠缠动力学,纠缠的大小与周期依赖于原子之间的偶极-偶极相互作用。选取适当的系统参数和相互作用时间,可以制备原子-场最大纠缠态与原子-原子最大纠缠态。

The entanglement dynamics of two partially entangled two-level atoms interacting with a single mode vacuum field is investigated. The entanglement dynamics between two partially entangled two-level atoms and the vacuum field is explored by using the quantum reduced entropy, and that between two two-level atoms is studied by using the quantum relative entropy. The influences of the atomic dipole-dipole interaction intensity on the entanglement dynamics of the system are also discussed. The results show that the system exhibits periodic entanglement dynamics, and the magnitude and the period of entanglement depend on the atomic dipole-dipole interaction. The atom-field maximal entanglement state and atom-atom maximal entanglement state can be preparated by selecting appropriate system parameters and the interaction time.