Key Laboratory of Quantum Information, University of Science and Technology of China, CAS, Hefei 230026, People's Republic of China.
Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, People's Republic of China.
Phys Rev Lett. 2015 Dec 31;115(26):260402. doi: 10.1103/PhysRevLett.115.260402. Epub 2015 Dec 23.
Quantum nonlocality gives us deeper insight into quantum physics. In addition, quantum nonlocality has been further recognized as an essential resource for device-independent quantum information processing in recent years. Most experiments of nonlocality are performed using a photonic system. However, until now, photonic experiments of nonlocality have involved at most four photons. Here, for the first time, we experimentally demonstrate the six-photon quantum nonlocality in an all-versus-nothing manner based on a high-fidelity (88.4%) six-photon Greenberger-Horne-Zeilinger state. Our experiment pushes multiphoton nonlocality studies forward to the six-photon region and might provide a larger photonic system for device-independent quantum information protocols.
量子非局域性使我们对量子物理学有了更深入的了解。此外，近年来，量子非局域性已被进一步确认为设备无关量子信息处理的重要资源。大多数非局域性实验都是使用光子系统进行的。然而，到目前为止，非局域性的光子实验最多涉及四个光子。在这里，我们首次基于高保真度（88.4%）六光子 Greenberger-Horne-Zeilinger 态以全有或全无的方式实验证明了六光子量子非局域性。我们的实验将多光子非局域性研究推进到了六光子区域，并可能为设备无关的量子信息协议提供了更大的光子系统。
