Measurements of Nonlocal Variables and Demonstration of the Failure of the Product Rule for a Pre- and Postselected Pair of Photons

Author(s): Xiao-Ye Xu, Wei-Wei Pan, Qin-Qin Wang, Jan Dziewior, Lukas Knips, Yaron Kedem, Kai Sun, Jin-Shi Xu, Yong-Jian Han, Chuan-Feng Li, Guang-Can Guo, and Lev Vaidman
We report the first implementation of the von Neumann instantaneous measurements of nonlocal variables, which becomes possible due to technological achievements in creating hyperentangled photons. Tests of reliability and of the nondemolition property of the measurements have been performed with hig...
[Phys. Rev. Lett. 122, 100405] Published Fri Mar 15, 2019

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