Strong Loophole-Free Test of Local Realism.
Strong Loophole-Free Test of Local Realism.
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DOI：
10.1103/physrevlett.115.250402
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发表时间：
2015-12-18
影响因子：
8.6
通讯作者：
Nam SW
中科院分区：
文献类型：
--
作者：
Shalm LK;Meyer-Scott E;Christensen BG;Bierhorst P;Wayne MA;Stevens MJ;Gerrits T;Glancy S;Hamel DR;Allman MS;Coakley KJ;Dyer SD;Hodge C;Lita AE;Verma VB;Lambrocco C;Tortorici E;Migdall AL;Zhang Y;Kumor DR;Farr WH;Marsili F;Shaw MD;Stern JA;Abellán C;Amaya W;Pruneri V;Jennewein T;Mitchell MW;Kwiat PG;Bienfang JC;Mirin RP;Knill E;Nam SW
我们提出了一个利用纠缠光子对的局部现实主义的无漏洞违反。我们确保在贝尔测试中所有相关事件都是类空间分离的，方法是将各方放置得足够远，并使用快速随机数发生器和高速偏振测量。一个高质量的偏振纠缠光子源，结合高效率，低噪声，单光子探测器，使我们能够进行测量，而不需要任何公平的采样假设。使用假设检验，我们计算出贝尔破坏的p值小至5.9 × 10−9，同时保持事件的类空分离。我们估计在何种程度上，当地的现实系统可以预测我们的测量选择。考虑到这种可预测性，我们调整后的最小p值为2.3 × 10−7。因此，我们拒绝接受局部实在论支配我们实验的假设。
We present a loophole-free violation of local realism using entangled photon pairs. We ensure that all relevant events in our Bell test are spacelike separated by placing the parties far enough apart and by using fast random number generators and high-speed polarization measurements. A high-quality polarization-entangled source of photons, combined with high-efficiency, low-noise, single-photon detectors, allows us to make measurements without requiring any fair-sampling assumptions. Using a hypothesis test, we compute p-values as small as 5.9 × 10−9 for our Bell violation while maintaining the spacelike separation of our events. We estimate the degree to which a local realistic system could predict our measurement choices. Accounting for this predictability, our smallest adjusted p-value is 2.3 × 10−7. We therefore reject the hypothesis that local realism governs our experiment.