Zhan Xiang, Kurzyński Paweł, Kaszlikowski Dagomir, Wang Kunkun, Bian Zhihao, Zhang Yongsheng, Xue Peng
Department of Physics, Southeast University, Nanjing 211189, China.
Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland.
Phys Rev Lett. 2017 Dec 1;119(22):220403. doi: 10.1103/PhysRevLett.119.220403.
Contextuality is an essential characteristic of quantum theory, and supplies the power for many quantum information processes. Previous tests of contextuality focus mainly on the probability distribution of measurement results. However, a test of contextuality can be formulated in terms of entropic inequalities whose violations imply information deficit in the studied system. This information deficit has not been observed on a single local system. Here we report the first experimental detection of information deficit in an entropic test of quantum contextuality based on photonic setup. The corresponding inequality is violated with more than 13 standard deviations.
关联性是量子理论的一个基本特征，并为许多量子信息过程提供了动力。先前对关联性的测试主要集中在测量结果的概率分布上。然而，关联性测试可以根据熵不等式来制定，其违背意味着所研究系统中存在信息亏缺。这种信息亏缺尚未在单个局部系统中被观测到。在此，我们报告了基于光子装置的量子关联性熵测试中首次对信息亏缺的实验检测。相应的不等式违背超过了13个标准差。
