首页|Improved decoy-state quantum key distribution with uncharacterized heralded single-photon sources

Improved decoy-state quantum key distribution with uncharacterized heralded single-photon sources

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Encoding system plays a significant role in quantum key distribution(QKD).However,the security and performance of QKD systems can be compromised by encoding misalignment due to the inevitable defects in realistic devices.To alleviate the influence of misalignments,a method exploiting statistics from mismatched basis is proposed to enable un-characterized sources to generate secure keys in QKD.In this work,we propose a scheme on four-intensity decoy-state quantum key distribution with uncharacterized heralded single-photon sources.It only requires the source states are pre-pared in a two-dimensional Hilbert space,and can thus reduce the complexity of practical realizations.Moreover,we carry out corresponding numerical simulations and demonstrate that our present four-intensity decoy-state scheme can achieve a much higher key rate compared than a three-intensity decoy-state method,and meantime it can obtain a longer transmission distance compared than the one using weak coherent sources.

quantum key distributionheralded single-photon sourcedecoy-state method

徐乐辰、张春辉、周星宇、王琴

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Institute of Quantum Information and Technology,Nanjing 210003,China

Broadband Wireless Communication and Sensor Network Technology,Key Laboratory of Ministry of Education,Nanjing University of Posts and Telecommunications,Nanjing 210003,China

Telecommunication and Networks National Engineering Research Center,Nanjing University of Posts and Telecommunications,Nanjing 210003,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaIndustrial Prospect and Key Core Technology Projects of Jiangsu Provincial Key Research and Development ProgramNatural Science Foundation of Jiangsu Province,ChinaNatural Science Foundation of Jiangsu Province,China

120741941210424062101285BE2022071BK20192001BK20210582

2024

10.1088/1674-1056/ad062a

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(2)
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