Experimental Synchronization of Independent Entangled Photon Sources
Tao Yang, Qiang Zhang, Teng‐Yun Chen, Shan Lu, Juan Yin, Jian-Wei Pan, Zhiyi Wei, Jing-Rong Tian, Jie Zhang · Physical Review Letters · 2006
We report the generation of independent entangled photon pairs from two synchronized but mutually incoherent laser sources. The quality of synchronization is confirmed by observing a violation of Bell's inequality with 3.2 standard deviations in an entanglement swapping experiment. The techniques developed in our experiment are not only important for realistic linear optical quantum-information processing, but also enable new tests of local realism.