如何能够不破坏纠缠态且能将其辨认区分出来是量子信息处理过程中一个很重要的问题.方案首先利用相干光与腔-原子系统的输入-输出过程构造受控相移门,然后利用受控相移门和零差探测技术构造宇称分析器,最后利用宇称分析器和Hadamard等操作构造非破坏性的原子Bell态分析器和原子GHZ态分析器.方案的优势在于:1)利用相干光源和零差探测技术,比以往方案中的单光子源和单光子探测易实现;2)构造的原子Bell态分析器和原子GHZ态分析器是非破坏性的.方案用到的所有方法和技术目前在实验上都是可以实现的.
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