CAS Key Laboratory of Quantum Information, University of Science and Technology of China, 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. 2018 May 4;120(18):180402. doi: 10.1103/PhysRevLett.120.180402.
We present the first experimental confirmation of the quantum-mechanical prediction of stronger-than-binary correlations. These are correlations that cannot be explained under the assumption that the occurrence of a particular outcome of an n≥3-outcome measurement is due to a two-step process in which, in the first step, some classical mechanism precludes n-2 of the outcomes and, in the second step, a binary measurement generates the outcome. Our experiment uses pairs of photonic qutrits distributed between two laboratories, where randomly chosen three-outcome measurements are performed. We report a violation by 9.3 standard deviations of the optimal inequality for nonsignaling binary correlations.
我们首次实验证实了量子力学关于强二元相关的预测。这些相关无法用以下假设解释：对于 n≥3 结果的测量，如果某个特定结果的出现归因于两步过程，其中第一步是某种经典机制排除了 n-2 个结果，第二步是二进制测量产生该结果。我们的实验使用在两个实验室之间分配的光子 ququart 对，其中随机执行三结果测量。我们报告了对非信号二进制相关的最优不等式的 9.3 个标准差违反。
