Satellite-based entanglement distribution over 1200 kilometers

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	Satellite-based entanglement distribution over 1200 kilometers
	Yin, Juan 1,2; Cao, Yuan 1,2; Li, Yu-Huai 1,2; Liao, Sheng-Kai 1,2; Zhang, Liang 2,3; Ren, Ji-Gang 1,2; Cai, Wen-Qi 1,2; Liu, Wei-Yue 1,2; Li, Bo 1,2; Dai, Hui 1,2
刊名	Science
	2017
卷号	356 期号:6343 页码:1140-1144
关键词	efficiency measurement - network analysis - physics - quantum mechanics - satellite imagery - spatial distribution - telecommunication
ISSN号	0036-8075
英文摘要	Long-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.
语种	英语
内容类型	期刊论文
源URL	[http://ir.ioe.ac.cn/handle/181551/8887]
专题	光电技术研究所_光电工程总体研究室（一室）
作者单位	1.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
推荐引用方式 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.