Detection-Loophole-Free Test of Quantum Nonlocality, and Applications
Detection-Loophole-Free Test of Quantum Nonlocality, and Applications
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DOI：
10.1103/physrevlett.111.130406
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发表时间：
2013-09-26
影响因子：
8.6
通讯作者：
Kwiat, P. G.
中科院分区：
文献类型：
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作者：
Christensen, B. G.;McCusker, K. T.;Kwiat, P. G.
我们提出了一种纠缠光子源，它违反了贝尔不等式（不考虑“公平采样”假设），超出了 7 个标准差。这种违规行为是第一个报道的用光子来堵住检测漏洞的实验，我们证明了足够的“效率”开销，最终可以对局部真实性进行完全无漏洞的测试。通过最大限度地违反附加贝尔测试来验证纠缠质量，测试量子相关性的上限。最后，我们使用该源生成“独立于设备”的私有量子随机数，其速率比之前的实验高出 4 个数量级。
We present a source of entangled photons that violates a Bell inequality free of the "fair-sampling" assumption, by over 7 standard deviations. This violation is the first reported experiment with photons to close the detection loophole, and we demonstrate enough "efficiency" overhead to eventually perform a fully loophole-free test of local realism. The entanglement quality is verified by maximally violating additional Bell tests, testing the upper limit of quantum correlations. Finally, we use the source to generate "device-independent" private quantum random numbers at rates over 4 orders of magnitude beyond previous experiments.