Experimental Violation of Two-Party Leggett-Garg Inequalities with Semiweak Measurements
Experimental Violation of Two-Party Leggett-Garg Inequalities with Semiweak Measurements
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DOI：
10.1103/physrevlett.106.040402
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发表时间：
2011-01-24
影响因子：
8.6
通讯作者：
Jordan, A. N.
中科院分区：
文献类型：
--
作者：
Dressel, J.;Broadbent, C. J.;Jordan, A. N.
我们推广了莱格特-加格不等式的推导，通过允许多粒子关联、侵入性检测和模棱两可的检测结果，系统地处理了更大类的实验情况。此外，我们展示了有多少这样的不等式可以用一个设置同时测试。作为原理证明，我们用偏振纠缠双光子态和基于菲涅耳反射的半弱偏振测量得到的数据打破了几个这样的两粒子不等式。我们还指出了特定的两方Leggett-Garg不等式违反与奇异弱值凸和之间的非平凡联系。
We generalize the derivation of Leggett-Garg inequalities to systematically treat a larger class of experimental situations by allowing multiparticle correlations, invasive detection, and ambiguous detector results. Furthermore, we show how many such inequalities may be tested simultaneously with a single setup. As a proof of principle, we violate several such two-particle inequalities with data obtained from a polarization-entangled biphoton state and a semiweak polarization measurement based on Fresnel reflection. We also point out a nontrivial connection between specific two-party Leggett-Garg inequality violations and convex sums of strange weak values.