Space-to-Ground Quantum Key Distribution Using a Small-Sized Payload on Tiangong-2 Space Lab

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	Space-to-Ground Quantum Key Distribution Using a Small-Sized Payload on Tiangong-2 Space Lab
	Liao, Sheng-Kai ; Lin, Jin ; Ren, Ji-Gang ; Liu, Wei-Yue ; Qiang, Jia ; Yin, Juan ; Li, Yang ; Shen, Qi ; Zhang, Liang ; Liang, Xue-Feng
刊名	CHINESE PHYSICS LETTERS
	2017
卷号	34 期号:9
关键词	COMMUNICATION DAYLIGHT SYSTEMS SECURE
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.
语种	英语
内容类型	期刊论文
源URL	[http://ir.ioe.ac.cn/handle/181551/8802]
专题	光电技术研究所_光电工程总体研究室（一室）
作者单位	1.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.CAS Ctr Excellence, Shanghai Branch, Shanghai 201315, Peoples R China 4.Synerget Innovat Ctr Quantum Informat & Quantum P, Shanghai 201315, Peoples R China 5.Chinese Acad Sci, Key Lab Space Act Optoelect Technol, Shanghai Inst Tech Phys, Shanghai 200083, Peoples R China 6.Beijing UCAS Space Technol Co Ltd, Beijing 100190, Peoples R China 7.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 8.Chinese Acad Sci, Inst Opt & Elect, Key Lab Opt Engn, Chengdu 610209, Peoples R China 9.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China
推荐引用方式 GB/T 7714	Liao, Sheng-Kai,Lin, Jin,Ren, Ji-Gang,et al. Space-to-Ground Quantum Key Distribution Using a Small-Sized Payload on Tiangong-2 Space Lab[J]. CHINESE PHYSICS LETTERS,2017,34(9).
APA	Liao, Sheng-Kai.,Lin, Jin.,Ren, Ji-Gang.,Liu, Wei-Yue.,Qiang, Jia.,...&Pan, Jian-Wei.(2017).Space-to-Ground Quantum Key Distribution Using a Small-Sized Payload on Tiangong-2 Space Lab.CHINESE PHYSICS LETTERS,34(9).
MLA	Liao, Sheng-Kai,et al."Space-to-Ground Quantum Key Distribution Using a Small-Sized Payload on Tiangong-2 Space Lab".CHINESE PHYSICS LETTERS 34.9(2017).