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Reference-frame-independent quantum key distribution with two-way classical communication

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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 distribu-tion(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.

quantum key distributionreference-frame-independenttwo-way classical communication

周淳、汪海涛、陆宜飞、姜晓磊、赵燕美、周雨、汪洋、李家骥、周砚扬、汪翔、李宏伟、鲍皖苏

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

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Key Research and Development Program of ChinaChina Postdoctoral Science FoundationNatural Science Foundation of Henan ProvinceNatural Science Foundation of Henan ProvinceAnhui Initiative in Quantum Information Technologies

615052616210159761605248616752352020YFA03097022021M691536202300410534202300410532

2024

10.1088/1674-1056/ad6a3d

中国物理B(英文版)
中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI
影响因子：0.995
ISSN：1674-1056
年,卷(期)：2024.33(10)