Improving the performance of reference-frame-independent measurement-device-independent quantum key distribution in hybrid channels

doi:10.1088/1674-1056/adbee4

中国物理B ›› 2025, Vol. 34 ›› Issue (5): 50302-050302.doi: 10.1088/1674-1056/adbee4

所属专题： SPECIAL TOPIC — Quantum communication and quantum network

Improving the performance of reference-frame-independent measurement-device-independent quantum key distribution in hybrid channels

Yan-Mei Zhao(赵燕美), Chun Zhou(周淳)†, Xiao-Lei Jiang(姜晓磊), Yi-Fei Lu(陆宜飞), Yu Zhou(周雨), Hai-Tao Wang(汪海涛), Yang Wang(汪洋), Jia-Ji Li(李家骥), Yan-Yang Zhou(周砚扬), 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

收稿日期:2025-01-09 修回日期:2025-02-25 接受日期:2025-03-11 出版日期:2025-05-15 发布日期:2025-04-18
通讯作者: Chun Zhou, Wan-Su Bao E-mail:winmaxsky@163.com;bws@qiclab.cn
基金资助:
Project 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 Natural Science Foundation of Henan Province (Grant Nos. 202300410534 and 202300410534), and the Anhui Initiative in Quantum Information Technologies.

Improving the performance of reference-frame-independent measurement-device-independent quantum key distribution in hybrid channels

Henan Key Laboratory of Quantum Information and Cryptography, SSF IEU, Zhengzhou 450001, China

Received:2025-01-09 Revised:2025-02-25 Accepted:2025-03-11 Online:2025-05-15 Published:2025-04-18
Contact: Chun Zhou, Wan-Su Bao E-mail:winmaxsky@163.com;bws@qiclab.cn
Supported by:
Project 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 Natural Science Foundation of Henan Province (Grant Nos. 202300410534 and 202300410534), and the Anhui Initiative in Quantum Information Technologies.

摘要/Abstract

摘要： The robustness of reference-frame-independent measurement-device-independent quantum key distribution (RFI-MDI-QKD) against detection system vulnerabilities and its tolerance to reference frame drifts make it an ideal choice for hybrid channels. However, the impact of atmospheric turbulence on transmittance fluctuations remains a significant challenge for enhancing the performance of RFI-MDI-QKD. In this paper, we apply prefixed-threshold real-time selection and advantage distillation techniques to RFI-MDI-QKD in a hybrid channels scenario. Then, we analytically derive formulas for secret key rate in hybrid channels. Simulation results show that our modified scheme has apparent advances in both maximum tolerant loss and secure key rate compared to the fiber-only channel. Specifically, the result demonstrates that the maximum transmission distance can be improved by 15 km and 28 km when $N=10^{12}$ and $10^{11}$. Our work not only provides a more robust key distribution protocol but also establishes a solid theoretical foundation for enhancing the performance of RFI-MDI-QKD in hybrid channels.

关键词: quantum key distribution, measurement-device-independent, hybrid channels

Abstract: The robustness of reference-frame-independent measurement-device-independent quantum key distribution (RFI-MDI-QKD) against detection system vulnerabilities and its tolerance to reference frame drifts make it an ideal choice for hybrid channels. However, the impact of atmospheric turbulence on transmittance fluctuations remains a significant challenge for enhancing the performance of RFI-MDI-QKD. In this paper, we apply prefixed-threshold real-time selection and advantage distillation techniques to RFI-MDI-QKD in a hybrid channels scenario. Then, we analytically derive formulas for secret key rate in hybrid channels. Simulation results show that our modified scheme has apparent advances in both maximum tolerant loss and secure key rate compared to the fiber-only channel. Specifically, the result demonstrates that the maximum transmission distance can be improved by 15 km and 28 km when $N=10^{12}$ and $10^{11}$. Our work not only provides a more robust key distribution protocol but also establishes a solid theoretical foundation for enhancing the performance of RFI-MDI-QKD in hybrid channels.

Key words: quantum key distribution, measurement-device-independent, hybrid channels

中图分类号: (Quantum cryptography and communication security)

03.67.Dd

03.67.Hk (Quantum communication) 03.67.-a (Quantum information)

Yan-Mei Zhao(赵燕美), Chun Zhou(周淳), Xiao-Lei Jiang(姜晓磊), Yi-Fei Lu(陆宜飞), Yu Zhou(周雨), Hai-Tao Wang(汪海涛), Yang Wang(汪洋), Jia-Ji Li(李家骥), Yan-Yang Zhou(周砚扬), Hong-Wei Li(李宏伟), and Wan-Su Bao(鲍皖苏). Improving the performance of reference-frame-independent measurement-device-independent quantum key distribution in hybrid channels[J]. 中国物理B, 2025, 34(5): 50302-050302.

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Improving the performance of reference-frame-independent measurement-device-independent quantum key distribution in hybrid channels

Improving the performance of reference-frame-independent measurement-device-independent quantum key distribution in hybrid channels

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