二能级原子与相干态腔场相互作用过程中的纠缠交换

用量子信息学的观点，分析了发生在一个多个原子和腔场组成的系统中最大纠缠态在原子和多模类奇-偶相干态光场之间相互转移的物理过程，该系统中原子和腔场之间由依赖于强 度耦合的Jaynes-Cummings模型描述.结果发现：通过控制原子与腔场相互作用的时间，并 对原子的状态进行测量，原子的最大纠缠态可以转换为类奇-偶相干态光场的最大纠缠态，反之，纠缠的多模类奇-偶相干态光场也可以转换为原子的最大纠缠态. 关键词： 量子信息 腔量子电动力学 连续变量纠缠态 纠缠交换和传递

Entanglement swapping in the process of two-level atoms interacting with cavity fields of coherent states

From the viewpoint of quantum information theory, a multiatom and muticavity system was investigated. In the system the interaction between the atoms and the fields in the cavities is described by the intensity-dependent coupling Jaynes-Cummings model. It is found that the atomic maximal entangled state can be transformed into the maximal odd-even-like coherent entangled state, whereas the maximal odd-even-like coherent entangled state also can be transformed into the atomic maximal entangled state.