论文标题
对无限拉伸阵列的真实多党纠缠的回收检测和任意长的顺序观察者
Recycled detection of genuine multiparty entanglement of unlimitedly stretched array of parties and arbitrarily long series of sequential observers
论文作者
论文摘要
我们考虑一个场景，在空间分离的观察者共享一个真正的多方纠缠量子状态，每个局部观察者都有一个量子。特定的量子由顺序和独立的观察者作用。我们研究了由任何一个顺序观察者和其他空间分离的各方对真正多部分纠缠的真实多部分纠缠的回收检测。我们表明，可以依次检测真正的多方纠缠，任意多次，对于任意数量的各方。推导了经过修改的真实多方纠缠证人对未划分的观察者进行UNSHARP测量的证人操作员，然后将其用于表明，任意数量的观察者可以顺序检测党派的Greenberger-Horne-Zeilinger和群集的真实多站点。多党广义的Greenberger-Horne-Zeilinger状态和一类混合状态的扩展也被证明是可以实现的。
We consider a scenario where spatially separated observers share a genuinely multiparty entangled quantum state with each local observer possessing a single qubit. A particular qubit is acted upon by sequential and independent observers. We study the recycled detection of genuine multipartite entanglement of multiqubit states by any one of the sequential observers and the rest of the spatially separated parties. We show that for it is possible to sequentially detect genuine multiparty entanglement, arbitrarily many times for an arbitrarily large number of parties. Modified genuine multiparty entanglement witness operators for unsharp measurements by sequential observers are deduced, which are then employed to show that an arbitrary number of observers can sequentially detect genuine multisite entanglement of Greenberger-Horne-Zeilinger and cluster states of an arbitrary number of parties. Extensions to multiparty generalized Greenberger-Horne-Zeilinger states and a class of mixed states are also shown to be achievable.
