Satellite-to-ground quantum key distribution
文献类型：期刊论文
| 作者 | 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 |
| 刊名 | NATURE
 |
| 出版日期 | 2017 |
| 卷号 | 549期号:7670页码:43+ |
| ISSN号 | 0028-0836 |
| 英文摘要 | 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. |
| 语种 | 英语 |
| 资助机构 | Strategic Priority Research Program on Space Science, Chinese Academy of Sciences ; National Natural Science Foundation of China |
| 源URL | [http://ir.nssc.ac.cn/handle/122/6032]  |
| 专题 | 国家空间科学中心_运控部/科学卫星综合运控中心 |
| 通讯作者 | Peng, CZ |
| 推荐引用方式 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+. |
入库方式： OAI收割
来源：国家空间科学中心
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