Bell’s theorem proves that quantum theory is inconsistent with local physical models. It has propelled research in the foundations of quantum theory and quantum information science. As a fundamental feature of quantum theory, it impacts predictions far beyond the traditional scenario of the Einstein-Podolsky-Rosen paradox. In the last decade, the investigation of nonlocality has moved beyond Bell's theorem to consider more sophisticated experiments that involve several independent sources which distribute shares of physical systems among many parties in a network. Network scenarios, and the nonlocal correlations that they give rise to, lead to phenomena that have no counterpart in traditional Bell experiments, thus presenting a formidable conceptual and practical challenge. This review discusses the main concepts, methods, results and future challenges in the emerging topic of Bell nonlocality in networks.

中文翻译：

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网络中的贝尔非局域性


贝尔定理证明量子理论与局部物理模型不一致。它推动了量子理论和量子信息科学的基础研究。作为量子理论的一个基本特征，它对预测的影响远远超出了爱因斯坦-波多尔斯基-罗森悖论的传统场景。在过去的十年中，对非局域性的研究已经超越了贝尔定理，考虑了更复杂的实验，这些实验涉及多个独立的源，这些源在网络中的多方之间分配物理系统的份额。网络场景以及它们引起的非局部相关性导致了传统贝尔实验中没有对应的现象，从而提出了巨大的概念和实践挑战。这篇综述讨论了网络中贝尔非局域性这个新兴主题的主要概念、方法、结果和未来的挑战。