Format

Send to

Choose Destination
Science. 2017 Jun 16;356(6343):1140-1144. doi: 10.1126/science.aan3211.

Satellite-based entanglement distribution over 1200 kilometers.

Yin J1,2, Cao Y1,2, Li YH1,2, Liao SK1,2, Zhang L2,3, Ren JG1,2, Cai WQ1,2, Liu WY1,2, Li B1,2, Dai H1,2, Li GB1,2, Lu QM1,2, Gong YH1,2, Xu Y1,2, Li SL1,2, Li FZ1,2, Yin YY1,2, Jiang ZQ3, Li M3, Jia JJ3, Ren G4, He D4, Zhou YL5, Zhang XX6, Wang N7, Chang X8, Zhu ZC5, Liu NL1,2, Chen YA1,2, Lu CY1,2, Shu R2,3, Peng CZ9,2, Wang JY10,3, Pan JW9,2.

Author information

1
Department of Modern Physics and Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, 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.
9
Department of Modern Physics and Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China. pcz@ustc.edu.cn jywang@mail.sitp.ac.cn pan@ustc.edu.cn.
10
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. pcz@ustc.edu.cn jywang@mail.sitp.ac.cn pan@ustc.edu.cn.

Abstract

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.

PMID:
28619937
DOI:
10.1126/science.aan3211

Supplemental Content

Full text links

Icon for HighWire
Loading ...
Support Center