Quantum key distribution over a mimicked dynamic-scattering channel

Qi-Hang LU ¹Fang-Xiang WANG ¹Wei CHEN ²Hai-Yang FU ²Yin-Jie LU ¹Shuang WANG ²De-Yong HE ²Zhen-Qiang YIN ²Guang-Can GUO ¹Zheng-Fu HAN²

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作者信息

1. CAS Key Laboratory of Quantum Information,University of Science and Technology of China,Hefei 230026,China;CAS Center for Excellence in Quantum Information and Quantum Physics,University of Science and Technology of China,Hefei 230026,China
2. CAS Key Laboratory of Quantum Information,University of Science and Technology of China,Hefei 230026,China;CAS Center for Excellence in Quantum Information and Quantum Physics,University of Science and Technology of China,Hefei 230026,China;Hefei National Laboratory,University of Science and Technology of China,Hefei 230088,China
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Abstract

Free-space quantum key distribution(QKD)plays an important role in the global quantum network.However,free space channels suffer from the atmospheric turbulence and scattering effects of haze,fog,and dust,which significantly weaken the performance of QKD or even block the secure quantum link.Here,we prove the performance of QKD over a dynamic scattering channel can be enhanced significantly using a fast wavefront shaping technique.The system achieves on average 10-dB enhancement of quantum transmission efficiency and establishes a secure quantum link for QKD.Our work demonstrates the feasibility of QKD through free-space dynamic scattering channels and enhances the deployment capability of complex-channel QKD system.

Key words

quantum key distribution/free space channel/channel turbulence/channel scattering/wavefront shaping

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基金项目

国家自然科学基金(62371437)

国家自然科学基金(62271463)

国家自然科学基金(62171424)

中央高校基本科研业务费专项(KY2470000006)

Innovation Program for Quantum Science and Technology(2021ZD0300701)

Plan for Major Anhui Provincial Science and Technology Project(202103a13010002)

出版年

2024

中国科学:信息科学(英文版)

中国科学院

中国科学:信息科学(英文版)

CSTPCDEI

影响因子：0.715

ISSN：1674-733X

参考文献量61

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