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

周淳 ¹汪海涛 ¹陆宜飞 ¹姜晓磊 ¹赵燕美 ¹周雨 ¹汪洋 ¹李家骥 ¹周砚扬 ¹汪翔 ¹李宏伟 ¹鲍皖苏¹

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作者信息

1. Henan Key Laboratory of Quantum Information and Cryptography,SSFIEU,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 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.

Key words

quantum key distribution/reference-frame-independent/two-way classical communication

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基金项目

National Natural Science Foundation of China(61505261)

National Natural Science Foundation of China(62101597)

National Natural Science Foundation of China(61605248)

National Natural Science Foundation of China(61675235)

National Key Research and Development Program of China(2020YFA0309702)

China Postdoctoral Science Foundation(2021M691536)

Natural Science Foundation of Henan Province(202300410534)

Natural Science Foundation of Henan Province(202300410532)

Anhui Initiative in Quantum Information Technologies()

出版年

2024

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

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