Implementation of carrier-grade quantum communication networks over 10000 km

IF 8.3 1区 物理与天体物理 Q1 PHYSICS, APPLIED
Hao-Ze Chen, Ming-Han Li, Yu Zhou Wang, Zhen-Geng Zhao, Cheng Ye, Fei Long Li, Zhu Chen, Sheng-Long Han, Bao Tang, Ya Jun Miao, Wei Qi
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Abstract

Quantum computing poses a serious threat to classical cryptographic algorithms based on computational complexity. Quantum key distribution (QKD), utilizing the principles of quantum mechanics, enables secure key exchange and has been proven to be an essential technology to resist the threat of quantum computing. China attaches great importance to the construction of QKD network to deal with this threat. In 2020, China established an integrated space-to-ground quantum communication network, which includes 32 backbone nodes and 4 metropolitan networks. Here we introduce China’s latest progress in the deployment of QKD networks, called the China Quantum Communication Network (CN-QCN). CN-QCN is an operational, long-range, and trusted-relay-based QKD network spanning over 10,000 kilometers, incorporating 145 fiber backbone nodes, and 20 metropolitan networks, which cover 17 provinces and 80 cities. Moreover, the network has deployed 6 ground stations linked with Jinan-1 quantum microsatellite. CN-QCN has not only surpassed its predecessor in scale, but also made significant advancements in multi-type QKD hybrid networking and long-range quantum network operation and maintenance. We present the network architecture, QKD implementation, and long-term performance of CN-QCN in this paper. This work lays the foundation for widespread applications of QKD in China.

Abstract Image

实现万公里以上电信级量子通信网络
量子计算对基于计算复杂度的经典密码算法构成了严重威胁。量子密钥分发(QKD)利用量子力学原理,实现了安全的密钥交换,已被证明是抵御量子计算威胁的重要技术。为应对这一威胁,中国高度重视QKD网络的建设。2020年,中国建成了包括32个骨干节点和4个城域网在内的空间到地面综合量子通信网络。在这里,我们介绍中国在QKD网络部署方面的最新进展,称为中国量子通信网络(CN-QCN)。CN-QCN是一个可运营的、远程的、基于可信中继的QKD网络,跨越10000公里,包括145个光纤骨干节点和20个城域网,覆盖17个省和80个城市。此外,该网络还部署了6个地面站,与吉安一号量子微卫星相连。CN-QCN不仅在规模上超越了其前身,而且在多类型QKD混合组网和远程量子网络运维方面取得了重大进展。本文介绍了网络架构、QKD实现和CN-QCN的长期性能。该工作为QKD在中国的广泛应用奠定了基础。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
npj Quantum Information
npj Quantum Information Computer Science-Computer Science (miscellaneous)
CiteScore
13.70
自引率
3.90%
发文量
130
审稿时长
29 weeks
期刊介绍: The scope of npj Quantum Information spans across all relevant disciplines, fields, approaches and levels and so considers outstanding work ranging from fundamental research to applications and technologies.
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