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arXiv 2201.12753quant-ph
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真实多部非定域性的检验

Test of Genuine Multipartite Nonlocality

Ya-Li Mao, Zheng-Da Li, Sixia Yu, Jingyun Fan

摘要:

虽然二分系统的贝尔非定域性是违反直觉的,但在我们的多体世界中,多分非定域性更是如此。最近的理论研究表明,在理论不可知论的方式,真正的多部非局部相关性不能解释任何因果理论涉及少部非经典资源和全球共享随机性。在这里,我们提供了一个贝尔型不等式作为一个测试真正的多部网络的非局域性,利用矩阵表示的因果结构的多部系统。我们进一步给出了实验证明,四光子GHZ态和广义四光子GHZ态都显著违反了不等式,即,所观察到的四分相关性抵制涉及受局部操作和共同共享随机性影响的三路非局部资源的解释,因此确认自然界是无限的多分非局部的。

英文摘要:

While Bell nonlocality of a bipartite system is counter-intuitive, multipartite nonlocality in our many-body world turns out to be even more so. Recent theoretical study reveals in a theory-agnostic manner that genuine multipartite nonlocal correlations cannot be explained by any causal theory involving fewer-partite nonclassical resources and global shared randomness. Here we provide a Bell-type inequality as a test for genuine multipartite nonlocality in network by exploiting a matrix representation of the causal structure of a multipartite system. We further present experimental demonstrations that both four-photon GHZ state and generalized four-photon GHZ state significantly violate the inequality, i.e., the observed four-partite correlations resist explanations involving three-way nonlocal resources subject to local operations and common shared randomenss, hence confirming that nature is boundless multipartite nonlocal.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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