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Satellite-based entanglement distribution over 1200 kilometers
Yin, Juan1,2; Cao, Yuan1,2; Li, Yu-Huai1,2; Liao, Sheng-Kai1,2; Zhang, Liang2,3; Ren, Ji-Gang1,2; Cai, Wen-Qi1,2; Liu, Wei-Yue1,2; Li, Bo1,2; Dai, Hui1,2; Li, Guang-Bing1,2; Lu, Qi-Ming1,2; Gong, Yun-Hong1,2; Xu, Yu1,2; Li, Shuang-Lin1,2; Li, Feng-Zhi1,2; Yin, Ya-Yun1,2; Jiang, Zi-Qing3; Li, Ming3; Jia, Jian-Jun3; Ren, Ge4; He, Dong4; Zhou, Yi-Lin5; Zhang, Xiao-Xiang6; Wang, Na7; Chang, Xiang8; Zhu, Zhen-Cai5; Liu, Nai-Le1,2; Chen, Yu-Ao1,2; Lu, Chao-Yang1,2; Shu, Rong2,3; Peng, Cheng-Zhi1,2; Wang, Jian-Yu2,3; Pan, Jian-Wei1,2
Source PublicationScience
Indexed BySCI ; Ei
AbstractLong-distance entanglement distribution is essential for both foundational tests of quantum physics and scalable quantum networks. Owing to channel loss, however, the previously achieved distance was limited to ∼100 kilometers. Here we demonstrate satellite-based distribution of entangled photon pairs to two locations separated by 1203 kilometers on Earth, through two satellite-to-ground downlinks with a summed length varying from 1600 to 2400 kilometers. We observed a survival of two-photon entanglement and a violation of Bell inequality by 2.37 ± 0.09 under strict Einstein locality conditions. The obtained effective link efficiency is orders of magnitude higher than that of the direct bidirectional transmission of the two photons through telecommunication fibers.
Keywordefficiency measurement - network analysis - physics - quantum mechanics - satellite imagery - spatial distribution - telecommunication
Document Type期刊论文
Affiliation1.Department of Modern Physics, University of Science and Technology of China, Hefei National Laboratory for Physical Sciences at Microscale, Hefei; 230026, China;
2.Chinese Academy of Sciences (CAS), Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics, University of Science and Technology of China, Shanghai; 201315, China;
3.Key Laboratory of Space Active Opto-Electronic Technology, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai; 200083, China;
4.Key Laboratory of Optical Engineering, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu; 610209, China;
5.Shanghai Engineering Center for Microsatellites, Shanghai; 201203, China;
6.Key Laboratory of Space Object and Debris Observation, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing; 210008, China;
7.Xinjiang Astronomical Observatory, Chinese Academy of Sciences, Urumqi; 830011, China;
8.Yunnan Observatories, Chinese Academy of Sciences, Kunming; 650011, China
Recommended Citation
GB/T 7714
Yin, Juan,Cao, Yuan,Li, Yu-Huai,et al. Satellite-based entanglement distribution over 1200 kilometers[J]. Science,2017,356(6343):1140-1144.
APA Yin, Juan.,Cao, Yuan.,Li, Yu-Huai.,Liao, Sheng-Kai.,Zhang, Liang.,...&Pan, Jian-Wei.(2017).Satellite-based entanglement distribution over 1200 kilometers.Science,356(6343),1140-1144.
MLA Yin, Juan,et al."Satellite-based entanglement distribution over 1200 kilometers".Science 356.6343(2017):1140-1144.
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