An integrated space-to-ground quantum communication network over 4,600 kilometres

Chen, Yu-Ao; Zhang, Qiang; Chen, Teng-Yun; Cai, Wen-Qi; Liao, Sheng-Kai; Zhang, Jun; Chen, Kai; Yin, Juan; Ren, Ji-Gang; Chen, Zhu; Han, Shenglong; Qing, YU; Liang, Ken; Zhou, Fei; Yuan, Xiao; Zhao, Meisheng; Wang, Tian-Yin; Jiang, Xiao; Zhang, Liang; Liu, Weiyue; Li, Yang; Shen, Qi; Cao, Yuan; Lu, Chao‐Yang; Shu, Rong; Wang, Yunlong; Li, Li; Liu, Nai-Le; Xu, Feihu; Wang, Xiang-Bin; Peng, Cheng-Zhi; Pan, Jian-Wei

doi:10.1038/s41586-020-03093-8

Cited by 529 publications

(238 citation statements)

References 54 publications

Supporting

Mentioning

232

Contrasting

Unclassified

Order By: Relevance

“…secure ways. Recently an intercontinental QKD network was reported 15 , connecting several metropolitan networks with a satellite. Our practical implementations and applications of a metropolitan network can be well combined with 15 for future directions.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Implementation of a 46-node quantum metropolitan area network

et al. 2021

Self Cite

View full text Add to dashboard Cite

Quantum key distribution (QKD) enables secure key exchanges between two remote users. The ultimate goal of secure communication is to establish a global quantum network. The existing field tests suggest that quantum networks are feasible. To achieve a practical quantum network, we need to overcome several challenges including realizing versatile topologies for large scales, simple network maintenance, extendable configuration and robustness to node failures. To this end, we present a field operation of a quantum metropolitan-area network with 46 nodes and show that all these challenges can be overcome with cutting-edge quantum technologies. In particular, we realize different topological structures and continuously run the network for 31 months, by employing standard equipment for network maintenance with an extendable configuration. We realize QKD pairing and key management with a sophisticated key control centre. In this implementation, the final keys have been used for secure communication such as real-time voice telephone, text messaging and file transmission with one-time pad encryption, which can support 11 pairs of users to make audio calls simultaneously. Combined with intercity quantum backbone and ground–satellite links, our metropolitan implementation paves the way toward a global quantum network.

show abstract

Section: Discussionmentioning

confidence: 99%

“…The satellite can serve as a trusted relay, connecting remote user nodes or subnetworks 14 . Recently, a large-scale satellite network has been implemented 15 , consisting of four metropolitan-area networks, a backbone network and two satellite-ground links. Here, we summarize the existing network implementations in Table 1.…”

Section: Introductionmentioning

confidence: 99%

Implementation of a 46-node quantum metropolitan area network

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…Arguably the most immediate impact of quantum computing will be on data security since current classical encryption protocols are increasingly vulnerable to more powerful classical computers as well as future quantum computers. Furthermore, quantum encryption protocols that can protect against attacks by quantum computers can already be implemented using currently available laser, wifi and fiberoptics technologies (Chen, 2021). Small scale quantum encrypted networks and proof-of-principle demonstrations of quantum encryption have already been implemented.…”

Section: Towards a Quantum Futurementioning

confidence: 99%

Beyond the Binary: Building a Quantum Future

Ghose¹

2021

Morals & Machines

View full text Add to dashboard Cite

Quantum mechanics has not only revolutionized our understanding of the fundamental laws of the universe, but has also transformed modern computing and communications technologies, leading to our current information age. The inherently nondeterministic nature of the theory is now leading to radical and powerful new frameworks for information processing and data transmission. This new quantum revolution raises social, political and ethical questions, but also provides an opportunity to develop quantum-inspired frameworks to examine and build the quantum information era.

show abstract

“…From 2016 to 2020, Vasylyev et al [26,27] showed model of probability distribution of transmittance (PDT) in atmosphere under different weather conditions; Liorni et al [28] applied PDT to satellitebased links and studied BB84 protocol in satellite-based links; Liang et al [29] used MDI-QKD protocol instead of BB84 protocol in [29]. In 2021, Pan's team [30] reported an integrated space-to-ground quantum communication network by BB84. They used Micius satellite to connect quantum communication network on the ground over 4600 km.…”

Section: Introductionmentioning

confidence: 99%

The Performance of Satellite-Based Links for Measurement-Device-Independent Quantum Key Distribution

Huang

Qin

Cui

et al. 2021

Entropy

View full text Add to dashboard Cite

Measurement-device-independent quantum key distribution (MDI-QKD) protocol has high practical value. Satellite-based links are useful to build long-distance quantum communication network. The model of satellite-based links for MDI-QKD was proposed but it lacks practicality. This work further analyzes the performance of it. First, MDI-QKD and satellite-based links model are introduced. Then considering the operation of the satellite the performance of their combination is studied under different weather conditions. The results may provide important references for combination of optical-fiber-based links on the ground and satellite-based links in space, which is helpful for large-scale quantum communication network.

show abstract

An integrated space-to-ground quantum communication network over 4,600 kilometres

Cited by 529 publications

References 54 publications

Implementation of a 46-node quantum metropolitan area network

Implementation of a 46-node quantum metropolitan area network

Beyond the Binary: Building a Quantum Future

The Performance of Satellite-Based Links for Measurement-Device-Independent Quantum Key Distribution

Contact Info

Product

Resources

About