spacetogroundquantumkeydistributionusingasmallsizedpayloadontiangong2spacelab
文献类型：期刊论文
| 作者 | Liao Shengkai2; Lin Jin2; Ren Jigang2; Liu Weiyue2; Qiang Jia3; Yin Juan2; Li Yang2; Shen Qi2; Zhang Liang1; Liang Xuefeng4 |
| 刊名 | chinesephysicsletters
 |
| 出版日期 | 2017 |
| 卷号 | 34期号:9 |
| ISSN号 | 0256-307X |
| 英文摘要 | Quantum technology establishes a foundation for secure communication via quantum key distribution (QKD). In the last two decades, the rapid development of QKD makes a global quantum communication network feasible. In order to construct this network, it is economical to consider small-sized and low-cost QKD payloads, which can be assembled on satellites with different sizes, such as space stations. Here we report an experimental demonstration of space-to-ground QKD using a small-sized payload, from Tiangong-2 space lab to Nanshan ground station. The 57.9-kg payload integrates a tracking system, a QKD transmitter along with modules for synchronization, and a laser communication transmitter. In the space lab, a 50 MHz vacuum + weak decoy-state optical source is sent through a reflective telescope with an aperture of 200 mm. On the ground station, a telescope with an aperture of 1200 mm collects the signal photons. A stable and high-transmittance communication channel is set up with a high-precision bidirectional tracking system, a polarization compensation module, and a synchronization system. When the quantum link is successfully established, we obtain a key rate over 100 bps with a communication distance up to 719 km. Together with our recent development of QKD in daylight, the present demonstration paves the way towards a practical satellite-constellation-based global quantum secure network with small-sized QKD payloads. |
| 资助项目 | [Technology and Engineering Center for Space Utilization Chinese Academy of Sciences, Chinese Academy of Sciences] ; [National Natural Science Foundation of China] |
| 语种 | 英语 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/51480]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.Shanghai Branch, CAS 2.中国科学技术大学 3.中国科学院上海技术物理研究所 4.中国科学院大学 5.中国科学院国家天文台 6.中国科学院光电技术研究所 7.中国科学院新疆天文台 |
| 推荐引用方式 GB/T 7714 | Liao Shengkai,Lin Jin,Ren Jigang,et al. spacetogroundquantumkeydistributionusingasmallsizedpayloadontiangong2spacelab[J]. chinesephysicsletters,2017,34(9). |
| APA | Liao Shengkai.,Lin Jin.,Ren Jigang.,Liu Weiyue.,Qiang Jia.,...&Pan Jianwei.(2017).spacetogroundquantumkeydistributionusingasmallsizedpayloadontiangong2spacelab.chinesephysicsletters,34(9). |
| MLA | Liao Shengkai,et al."spacetogroundquantumkeydistributionusingasmallsizedpayloadontiangong2spacelab".chinesephysicsletters 34.9(2017). |
入库方式： OAI收割
来源：国家天文台
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