Loss tolerance quantum key distribution based on the signal extraction model and advantage distillation technology

被引：0

作者：

Lu, Yi-fei ^{[1
]}

Jiang, Mu-sheng ^{[1
]}

Wang, Yang ^{[1
]}

Zhou, Yan-yang ^{[1
]}

Li, Jia-ji ^{[1
]}

Zhou, Yu ^{[1
]}

Jiang, Xiao-lei ^{[1
]}

Zhang, Hai-long ^{[1
]}

Wang, Xiang ^{[1
]}

Guo, Yuyao ^{[2
]}

Zhou, Linjie ^{[2
]}

Zhou, Chun ^{[1
]}

Li, Hong-wei ^{[1
]}

Bao, Wan-su ^{[1
]}

机构：

[1] IEU, Henan Key Lab Quantum Informat & Cryptog, Zhengzhou 450001, Peoples R China

[2] Shanghai Jiao Tong Univ, Dept Elect Engn, Shanghai Key Lab Nav & Locat Serv, State Key Lab Adv Opt Commun Syst & Networks, Shanghai 200240, Peoples R China

来源：

OPTICS EXPRESS | 2024年 / 32卷 / 23期

关键词：

ATOMIC ENSEMBLES; REPEATERS; SECURITY;

D O I：

10.1364/OE.540592

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Compared with traditional networks, quantum key distribution (QKD) offers the ultimate resources, allowing two remote users to share secret symmetric keys regardless of the capabilities of eavesdroppers. However, the widespread application of commercial QKD is still challenging due to the low photon detection efficiency and the extremely high transmission loss. Here we demonstrate a fully commercial phase-encoding QKD system using a signal extraction model and advantage distillation technology to suppress detector noise and perform real-time pre-error correction. 1.89 x 10-10 in the asymptotic case and 7.43 x 10-12 in the nonasymptotic case secret key bits per pulse are achieved with a total loss of 70.05 dB. This method not only increases the transmission loss tolerance but also provides a more realistic deployment of quantum communication. (c) 2024 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

引用

页码：41511 / 41523

页数：13

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