中国物理B ›› 2024, Vol. 33 ›› Issue (11): 110302-110302.doi: 10.1088/1674-1056/ad757a

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Improved model on asynchronous measurement-device-independent quantum key distribution with realistic devices

Mingshuo Sun(孙铭烁)1,2, Chun-Hui Zhang(张春辉)1,2,†, Rui Zhang(章睿)3, Xing-Yu Zhou(周星宇)1,2, Jian Li(李剑)1,2, and Qin Wang(王琴)1,2,‡   

  1. 1 Institute of Quantum Information and Technology, Nanjing University of Posts and Telecommunications, Nanjing 210003, China;
    2 Broadband Wireless Communication and Sensor Network Technology, Key Laboratory of Ministry of Education, Nanjing University of Posts and Telecommunications, Nanjing 210003, China;
    3 Changqing Oilfield Company Digital and Intelligent Business Division, China National Petroleum Corporation, Xi'an 710299, China
  • 收稿日期:2024-07-08 修回日期:2024-08-26 接受日期:2024-08-30 出版日期:2024-11-15 发布日期:2024-11-15
  • 基金资助:
    Project supported by Natural Science Foundation of Jiangsu Province (Grant Nos. BE2022071 and BK20192001),the National Natural Science Foundation of China (Grant Nos. 12074194, 62101285, 62471248, and 12104240), and Postgraduate Research & Practice Innovation Program of Jiangsu Province (Grant No. KYCX22 0954).

Improved model on asynchronous measurement-device-independent quantum key distribution with realistic devices

Mingshuo Sun(孙铭烁)1,2, Chun-Hui Zhang(张春辉)1,2,†, Rui Zhang(章睿)3, Xing-Yu Zhou(周星宇)1,2, Jian Li(李剑)1,2, and Qin Wang(王琴)1,2,‡   

  1. 1 Institute of Quantum Information and Technology, Nanjing University of Posts and Telecommunications, Nanjing 210003, China;
    2 Broadband Wireless Communication and Sensor Network Technology, Key Laboratory of Ministry of Education, Nanjing University of Posts and Telecommunications, Nanjing 210003, China;
    3 Changqing Oilfield Company Digital and Intelligent Business Division, China National Petroleum Corporation, Xi'an 710299, China
  • Received:2024-07-08 Revised:2024-08-26 Accepted:2024-08-30 Online:2024-11-15 Published:2024-11-15
  • Contact: Chun-Hui Zhang, Qin Wang E-mail:chz@njupt.edu.cn;qinw@njupt.edu.cn
  • Supported by:
    Project supported by Natural Science Foundation of Jiangsu Province (Grant Nos. BE2022071 and BK20192001),the National Natural Science Foundation of China (Grant Nos. 12074194, 62101285, 62471248, and 12104240), and Postgraduate Research & Practice Innovation Program of Jiangsu Province (Grant No. KYCX22 0954).

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摘要： In principle, the asynchronous measurement-device-independent quantum key distribution (AMDI-QKD) can surpass the key rate capacity without phase tracking and phase locking. However, practical imperfections in sources or detections would dramatically depress its performance. Here, we present an improved model on AMDI-QKD to reduce the influence of these imperfections, including intensity fluctuation, the afterpulse effect, and the dead time of detectors. Furthermore, we carry out corresponding numerical simulations. Simulation results show that, by implementing our present work, it can have more than 100 km longer secure transmission distance and one order of magnitude enhancement in the key generation rate after 320 km compared with the standard method. Moreover, our model can still break the Pirandola-Laurenza-Ottaviani-Banchi (PLOB) bound even under realistic experimental conditions.

关键词: asynchronous measurement-device-independent quantum key distribution, intensity fluctuations, afterpulse, dead time

Abstract: In principle, the asynchronous measurement-device-independent quantum key distribution (AMDI-QKD) can surpass the key rate capacity without phase tracking and phase locking. However, practical imperfections in sources or detections would dramatically depress its performance. Here, we present an improved model on AMDI-QKD to reduce the influence of these imperfections, including intensity fluctuation, the afterpulse effect, and the dead time of detectors. Furthermore, we carry out corresponding numerical simulations. Simulation results show that, by implementing our present work, it can have more than 100 km longer secure transmission distance and one order of magnitude enhancement in the key generation rate after 320 km compared with the standard method. Moreover, our model can still break the Pirandola-Laurenza-Ottaviani-Banchi (PLOB) bound even under realistic experimental conditions.

Key words: asynchronous measurement-device-independent quantum key distribution, intensity fluctuations, afterpulse, dead time

中图分类号:  (Quantum communication)

  • 03.67.Hk
03.67.Dd (Quantum cryptography and communication security) 03.67.-a (Quantum information) 03.67.Lx (Quantum computation architectures and implementations)