Experimental Distillation of Quantum Nonlocality
Chong Zu, Dong-Ling Deng, Pan‐Yu Hou, X.-Y. Chang, Fei Wang, Luming Duan · Physical Review Letters · 2013
We report the first experimental demonstration of distillation of quantum nonlocality, confirming the recent theoretical protocol [Phys. Rev. Lett. 102, 120401 (2009)]. Quantum nonlocality is described by a correlation box with binary inputs and outputs, and the nonlocal boxes are realized through appropriate measurements on polarization entangled photon pairs. We demonstrate that nonlocality is amplified by connecting two nonlocal boxes into a composite one through local operations and four-photon measurements.