Closing the Locality and Detection Loopholes in Multiparticle Entanglement Self-Testing,Physical Review Letters

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Closing the Locality and Detection Loopholes in Multiparticle Entanglement Self-Testing
Physical Review Letters ( IF 8.6 ) Pub Date : 2022-06-23 , DOI: 10.1103/physrevlett.128.250401
Dian Wu _{1,

2,

3} , Qi Zhao ₄ , Can Wang _{1,

2,

3} , Liang Huang _{1,

2,

3} , Yang-Fan Jiang ₅ , Bing Bai _{1,

2,

3} , You Zhou ₆ , Xue-Mei Gu _{1,

2,

3} , Feng-Ming Liu _{1,

2,

3} , Ying-Qiu Mao _{1,

2,

3} , Qi-Chao Sun _{1,

2,

3} , Ming-Cheng Chen _{1,

2,

3} , Jun Zhang _{1,

2,

3} , Cheng-Zhi Peng _{1,

2,

3} , Xiao-Bo Zhu _{1,

2,

3} , Qiang Zhang _{1,

2,

3} , Chao-Yang Lu _{1,

2,

3} , Jian-Wei Pan _{1,

2,

3}

Affiliation

First proposed by Mayers and Yao, self-testing provides a certification method to infer the underlying physics of quantum experiments in a black-box scenario. Numerous demonstrations have been reported to self-test various types of entangled states. However, all the multiparticle self-testing experiments reported so far suffer from both detection and locality loopholes. Here, we report the first experimental realization of multiparticle entanglement self-testing closing the locality loophole in a photonic system, and the detection loophole in a superconducting system, respectively. We certify three-party and four-party GHZ states with at least 0.84(1) and 0.86(3) fidelities in a device-independent way. These results can be viewed as a meaningful advance in multiparticle loophole-free self-testing, and also significant progress on the foundations of quantum entanglement certification.

中文翻译：

封闭多粒子纠缠自测中的局部性和检测漏洞

自测试首先由 Mayers 和 Yao 提出，它提供了一种认证方法，可以在黑盒场景中推断量子实验的基础物理。据报道，有许多演示可以自我测试各种类型的纠缠态。然而，迄今为止报道的所有多粒子自测实验都存在检测和定位漏洞。在这里，我们报告了多粒子纠缠自测的第一个实验实现，分别填补了光子系统中的局部漏洞和超导系统中的检测漏洞。我们以独立于设备的方式以至少 0.84(1) 和 0.86(3) 的保真度认证三方和四方 GHZ 状态。这些结果可以被视为多粒子无漏洞自测的有意义的进步，

更新日期：2022-06-23

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