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基于四粒子GHZ纠缠态实现双向隐形传态

, PP. 285-290

Keywords: 量子光学,双向隐形传态,四粒子GHZ纠缠态,量子投影测量,幺正操作

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Abstract:

提出了一种用四粒子GHZ纠缠态作为量子信道,实现量子双向隐形传态的方案。通信双方Alice和Bob事先共享俩对四粒子GHZ纠缠态。通信开始后,Alice和Bob分别对自己拥有的粒子作量子投影测量,并将测量结果通过经典信道告诉对方。Alice和Bob根据对方提供的测量结果,做相应的幺正变换,即在己方的粒子上再现对方要传的量子信息,从而实现整个双向传态的目的。只要通信双方事先选取合适的GHZ纠缠态作为量子信道以及分发不同对应的纠缠粒子即可分别实现单量子比特任意态、双量子比特Bell纠缠态和三量子比特GHZ纠缠态的双向隐形传态。

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