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Satellite-to-ground quantum key distribution
Liao, Sheng-Kai1,2,3; Cai, Wen-Qi1,2,3; Liu, Wei-Yue1,2,3; Zhang, Liang3,4; Li, Yang1,2,3; Ren, Ji-Gang1,2,3; Yin, Juan1,2,3; Shen, Qi1,2,3; Cao, Yuan1,2,3; Li, Zheng-Ping1,2,3; Li, Feng-Zhi1,2,3; Chen, Xia-Wei1,2,3; Sun, Li-Hua1,2,3; Jia, Jian-Jun4; Wu, Jin-Cai4; Jiang, Xiao-Jun5; Wang, Jian-Feng5; Huang, Yong-Mei6; Wang, Qiang6; Zhou, Yi-Lin7; Deng, Lei7; Xi, Tao8; Ma, Lu9; Hu, Tai10; Zhang, Qiang1,2,3; Chen, Yu-Ao1,2,3; Liu, Nai-Le1,2,3; Wang, Xiang-Bin3; Zhu, Zhen-Cai6,7; Lu, Chao-Yang1,2,3; Shu, Rong3,4; Peng, Cheng-Zhi1,2,3; Wang, Jian-Yu3,4; Pan, Jian-Wei1,2,3
Source PublicationNATURE
Contribution Rank9

Quantum key distribution (QKD) uses individual light quanta in quantum superposition states to guarantee unconditional communication security between distant parties. However, the distance over which QKD is achievable has been limited to a few hundred kilometres, owing to the channel loss that occurs when using optical fibres or terrestrial free space that exponentially reduces the photon transmission rate. Satellite-based QKD has the potential to help to establish a global-scale quantum network, owing to the negligible photon loss and decoherence experienced in empty space. Here we report the development and launch of a low-Earth-orbit satellite for implementing decoy-state QKD-a form of QKD that uses weak coherent pulses at high channel loss and is secure because photon-number-splitting eavesdropping can be detected. We achieve a kilohertz key rate from the satellite to the ground over a distance of up to 1,200 kilometres. This key rate is around 20 orders of magnitudes greater than that expected using an optical fibre of the same length. The establishment of a reliable and efficient space-to-ground link for quantum-state transmission paves the way to global-scale quantum networks.

WOS HeadingsScience & Technology
Indexed BySCI
WOS KeywordEntanglement Distribution ; Atomic Ensembles ; Linear Optics ; Communication ; Teleportation ; Cryptography ; Purification ; Repeaters ; Channels ; Network
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000409388700029
Funding OrganizationStrategic Priority Research Program on Space Science, Chinese Academy of Sciences ; National Natural Science Foundation of China
Citation statistics
Cited Times:433[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorPeng, Cheng-Zhi
Affiliation1.Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Anhui, Peoples R China
2.Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China
3.Univ Sci & Technol China, CAS, Ctr Excellence & Synerget Innovat, Ctr Quantum Informat & Quantum Phys, Shanghai 201315, Peoples R China
4.Chinese Acad Sci, Shanghai Inst Tech Phys, Key Lab Space Act Optoelect Technol, Shanghai 200083, Peoples R China
5.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
6.Chinese Acad Sci, Inst Opt & Elect, Key Lab Opt Engn, Chengdu 610209, Sichuan, Peoples R China
7.Shanghai Engn Ctr Microsatellites, Shanghai 201203, Peoples R China
8.Xian Satellite Control Ctr, State Key Lab Astronaut Dynam, Xian 710061, Shaanxi, Peoples R China
9.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China
10.Chinese Acad Sci, Natl Space Sci Ctr, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Liao, Sheng-Kai,Cai, Wen-Qi,Liu, Wei-Yue,et al. Satellite-to-ground quantum key distribution[J]. NATURE,2017,549(7670):43-+.
APA Liao, Sheng-Kai.,Cai, Wen-Qi.,Liu, Wei-Yue.,Zhang, Liang.,Li, Yang.,...&Pan, Jian-Wei.(2017).Satellite-to-ground quantum key distribution.NATURE,549(7670),43-+.
MLA Liao, Sheng-Kai,et al."Satellite-to-ground quantum key distribution".NATURE 549.7670(2017):43-+.
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