在无信号原则下真实多方非局域性的实验检验。
Experimental test of genuine multipartite nonlocality under the no-signalling principle.
机构信息
Key Laboratory of Quantum Information, University of Science and Technology of China, CAS, Hefei, 230026, China.
Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, 230026, P.R. China.
出版信息
Sci Rep. 2016 Dec 20;6:39327. doi: 10.1038/srep39327.
Genuine multipartite nonlocality (GMN) has been recognized as the strongest form of multipartite quantum correlation. However, there exist states that cannot violate the Svetlichny inequality derived from the standard definition of GMN, even though they possess GMN properties. The reason is that the standard definition of GMN allows correlations that permit signalling among parties, which is inconsistent with an operational definition. Here, for the first time, we present an experimental test of GMN in the no-signalling scenario, with a three-photon pure state |ψ〉 and a noisy W state. The experimental results show that these states cannot violate the Svetlichny inequality. However, our results also demonstrate that they do violate a new inequality derived from the definition of GMN based on the no-signalling principle, i.e., these states can exhibit GMN under the requirement of no-signalling. Our results will be useful for the study and applications of GMN in quantum communications and quantum computation.
真正的多方非局域性（GMN）已被认为是多方量子相关性的最强形式。然而，存在一些状态，即使它们具有 GMN 特性，也不能违反基于 GMN 标准定义得出的 Svetlichny 不等式。原因是 GMN 的标准定义允许允许各方之间进行信号传递的关联，这与操作定义不一致。在这里，我们首次在无信号场景中对 GMN 进行了实验测试，使用了三光子纯态 |ψ〉和噪声 W 态。实验结果表明，这些状态不能违反 Svetlichny 不等式。然而，我们的结果也表明，它们确实违反了基于无信号原理的 GMN 定义导出的新不等式，即，在无信号的要求下，这些状态可以表现出 GMN。我们的结果将有助于量子通信和量子计算中 GMN 的研究和应用。
Zotero 插件