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Satellite-to-ground quantum key distribution
Liao, Sheng-Kai; Cai, Wen-Qi; Liu, Wei-Yue; Zhang, Liang; Li, Yang; Ren, Ji-Gang; Yin, Juan; Shen, Qi; Cao, Yuan; Li, Zheng-Ping; Li, Feng-Zhi; Chen, Xia-Wei; Sun, Li-Hua; Jia, Jian-Jun; Wu, Jin-Cai; Jiang, Xiao-Jun; Wang, Jian-Feng; Huang, Yong-Mei; Wang, Qiang; Zhou, Yi-Lin; Deng, Lei; Xi, Tao; Ma, Lu; Hu, Tai; Zhang, Qiang; Chen, Yu-Ao; Liu, Nai-Le; Wang, Xiang-Bin; Zhu, Zhen-Cai; Lu, Chao-Yang; Shu, Rong; Peng, Cheng-Zhi; Wang, Jian-Yu; Pan, Jian-Wei; Peng, CZ
Department运控部/科学卫星综合运控中心
Source PublicationNATURE
2017
Volume549Issue:7670Pages:43+
ISSN0028-0836
Language英语
AbstractQuantum 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.
Indexed BySCI ; EI
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/6032
Collection运控部/科学卫星综合运控中心
Corresponding AuthorPeng, CZ
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.,...&Peng, CZ.(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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2017549767043+.pdf(3942KB)期刊论文作者接受稿开放获取CC BY-NC-SAApplication Full Text
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