论文标题
真正的多部分非局部性是量子网络的固有的
Genuine multipartite nonlocality is intrinsic to quantum networks
论文作者
论文摘要
量子纠缠和非局部性是密不可分的。但是，虽然纠缠对于非局部性是必要的，但在标准铃铛方案中并不总是足够的。我们得出了足够的条件，以引起网络中真正的多部分非局部性。我们发现，双方连接的任何网络是由两分纯纠缠状态连接的，都是真正的多部分非本地，独立于共享状态和网络拓扑中的纠缠数量。作为此结果的应用，我们还表明，所有纯真实的多部分纠缠状态都是真正的多部分非本地，因为可以在有限的许多真实多部分纠缠状态的有限的副本上找到测量值，从而产生真正的多部分非局限性行为。我们的结果为使用任何连接的网络生成真正的多部分非局部性的可行方式铺平了道路。
Quantum entanglement and nonlocality are inextricably linked. However, while entanglement is necessary for nonlocality, it is not always sufficient in the standard Bell scenario. We derive sufficient conditions for entanglement to give rise to genuine multipartite nonlocality in networks. We find that any network where the parties are connected by bipartite pure entangled states is genuine multipartite nonlocal, independently of the amount of entanglement in the shared states and of the topology of the network. As an application of this result, we also show that all pure genuine multipartite entangled states are genuine multipartite nonlocal in the sense that measurements can be found on finitely many copies of any genuine multipartite entangled state to yield a genuine multipartite nonlocal behaviour. Our results pave the way towards feasible manners of generating genuine multipartite nonlocality using any connected network.
