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Reference-frame-independent quantum key distribution with two-way classical communication |
| Chun Zhou(周淳), Hai-Tao Wang(汪海涛)†, Yi-Fei Lu(陆宜飞), Xiao-Lei Jiang(姜晓磊), Yan-Mei Zhao(赵燕美), Yu Zhou(周雨), Yang Wang(汪洋), Jia-Ji Li(李家骥), Yan-Zang Zhou(周砚扬), Xiang Wang(汪翔)‡, Hong-Wei Li(李宏伟), and Wan-Su Bao(鲍皖苏) |
| Henan Key Laboratory of Quantum Information and Cryptography, SSF IEU, Zhengzhou 450001, China |
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Abstract The data post-processing scheme based on two-way classical communication (TWCC) can improve the tolerable bit error rate and extend the maximal transmission distance when used in a quantum key distribution (QKD) system. In this study, we apply the TWCC method to improve the performance of reference-frame-independent quantum key distribution (RFI-QKD), and analyze the influence of the TWCC method on the performance of decoy-state RFI-QKD in both asymptotic and non-asymptotic cases. Our numerical simulation results show that the TWCC method is able to extend the maximal transmission distance from 175 km to 198 km and improve the tolerable bit error rate from 10.48% to 16.75%. At the same time, the performance of RFI-QKD in terms of the secret key rate and maximum transmission distance are still greatly improved when statistical fluctuations are considered. We conclude that RFI-QKD with the TWCC method is of practical interest.
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Received: 22 May 2024
Revised: 19 July 2024
Accepted manuscript online: 02 August 2024
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PACS:
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03.67.Dd
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(Quantum cryptography and communication security)
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03.67.Hk
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(Quantum communication)
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03.67.-a
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(Quantum information)
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| Fund: The project was supported by the National Natural Science Foundation of China (Grant Nos. 61505261, 62101597, 61605248, and 61675235), the National Key Research and Development Program of China (Grant No. 2020YFA0309702), the China Postdoctoral Science Foundation (Grant No. 2021M691536), the Natural Science Foundation of Henan Province (Grant Nos. 202300410534 and 202300410532), and the Anhui Initiative in Quantum Information Technologies. |
Corresponding Authors:
Hai-Tao Wang, Xiang Wang
E-mail: wht@qiclab.cn;dixonwx@163.com
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Cite this article:
Chun Zhou(周淳), Hai-Tao Wang(汪海涛), Yi-Fei Lu(陆宜飞), Xiao-Lei Jiang(姜晓磊), Yan-Mei Zhao(赵燕美), Yu Zhou(周雨), Yang Wang(汪洋), Jia-Ji Li(李家骥), Yan-Zang Zhou(周砚扬), Xiang Wang(汪翔), Hong-Wei Li(李宏伟), and Wan-Su Bao(鲍皖苏) Reference-frame-independent quantum key distribution with two-way classical communication 2024 Chin. Phys. B 33 100302
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