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arXiv:1605.08547 · Physical Review Letters

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

Published Nov 15, 2016• 548 citations

Abstract

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.

DOI: 10.1103/physrevlett.117.210502

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