Experimental Ten-Photon Entanglement
Xi‐Lin Wang, Luo-Kan Chen, Wei-Yao Li, He-Liang Huang, Cheng Liu, C. Chen, Yi-Han Luo, Zu-En Su, Dian Wu, Zai-Dong Li, He Lu, Yanjun Hu, Xiao Qiang Jiang, Cheng-Zhi Peng, L. Li, N.-L. Liu, Yu-Ao Chen, Chao‐Yang Lu, Jian-Wei Pan · Physical Review Letters · 2016
We report the first experimental demonstration of quantum entanglement among ten spatially separated single photons. A near-optimal entangled photon-pair source was developed with simultaneously a source brightness of ∼12 MHz/W, a collection efficiency of ∼70%, and an indistinguishability of ∼91% between independent photons, which was used for a step-by-step engineering of multiphoton entanglement. Under a pump power of 0.57 W, the ten-photon count rate was increased by about 2 orders of magnitude compared to previous experiments, while maintaining a state fidelity sufficiently high for proving the genuine ten-particle entanglement. Our work created a state-of-the-art platform for multiphoton experiments, and enabled technologies for challenging optical quantum information tasks, such as the realization of Shor's error correction code and high-efficiency scattershot boson sampling.