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29 March 2024 |
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Article overview
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Implementation of a 46-node quantum metropolitan area network | Teng-Yun Chen
; Xiao Jiang
; Shi-Biao Tang
; Lei Zhou
; Xiao Yuan
; Hongyi Zhou
; Jian Wang
; Yang Liu
; Luo-Kan Chen
; Wei-Yue Liu
; Hong-Fei Zhang
; Ke Cui
; Hao Liang
; Xiao-Gang Li
; Yingqiu Mao
; Liu-Jun Wang
; Si-Bo Feng
; Qing Chen
; Qiang Zhang
; Li Li
; Nai-Le Liu
; Cheng-Zhi Peng
; Xiongfeng Ma
; Yong Zhao
; Jian-Wei Pan
; | Date: |
10 Sep 2021 | Abstract: | 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 realising 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 realise
different topological structures and continuously run the network for 31
months, by employing standard equipment for network maintenance with an
extendable configuration. We realise QKD pairing and key management with a
sophisticated key control center. 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
inter-city quantum backbone and ground-satellite links, our metropolitan
implementation paves the way toward a global quantum network. | Source: | arXiv, 2109.04736 | Services: | Forum | Review | PDF | Favorites |
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