Practical Long-Distance Measurement-Device-Independent Quantum Key Distribution By Four-Intensity Protocol

Hu，Xiao Long1; Jiang，Cong2; Yu，Zong Wen3; Wang，Xiang Bin2,4,5,6,7

2021

10.1002/qute.202100069

Advanced Quantum Technologies   影响因子和分区

2511-9044

Quantum key distribution (QKD) can provide unconditionally secure private communication between two remote parties. The measurement-device-independent (MDI) QKD can remove all security loopholes in measurement devices. However, the large value of the observed error rate in X basis has severely limited its key rate. The four-intensity protocol with fully optimized post data processing can improve the key rate and distance of MDI-QKD effectively. In this paper, the four-intensity MDI-QKD protocol is reviewed. In the four-intensity protocol, each of Alice and Bob uses one intensity in Z basis and three intensities in X basis (normally including one vacuum). This improves the number of effective bits in Z basis. The joint mathematical treatment for statistical fluctuation and the parameter scan pointing directly to the final key rate are applied to reduce the effect of statistical fluctuation. The double scanning method further improves the key rate and the secure distance of the four-intensity protocol. These have greatly improved the performance of the protocol with finite-key effects. So far, many MDI-QKD experiments are based on the four-intensity protocol. The successful results of these experiments have clearly shown the superiority of the four-intensity protocol in practical long-distance MDI-QKD.

decoy state finite-key effects four-intensity protocol measurement-device-independent quantum key distribution

ESCI ; EI

英语

其他

WOS:000712091800001

20214411092306

Data handling ; Quantum theory

Data Processing and Image Processing:723.2 ; Quantum Theory; Quantum Mechanics:931.4

2-s2.0-85117949214

Scopus

1.School of Physics,State Key Laboratory of Optoelectronic Materials and Technologies,Sun Yat-sen University,Guangzhou,510275,China
2.Jinan Institute of Quantum technology,SAICT,Jinan,250101,China
3.Data Communication Science and Technology Research Institute,Beijing,100191,China
4.State Key Laboratory of Low Dimensional Quantum Physics,Department of Physics,Tsinghua University,Beijing,100084,China
5.Shanghai Branch,CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics,University of Science and Technology of China,Shanghai,201315,China
6.Shenzhen Institute for Quantum Science and Engineering,and Physics Department,Southern University of Science and Technology,Shenzhen,518055,China
7.Frontier Science Center for Quantum Information,Beijing,100084,China

Hu，Xiao Long,Jiang，Cong,Yu，Zong Wen,et al. Practical Long-Distance Measurement-Device-Independent Quantum Key Distribution By Four-Intensity Protocol[J]. Advanced Quantum Technologies,2021,4.

Hu，Xiao Long,Jiang，Cong,Yu，Zong Wen,&Wang，Xiang Bin.(2021).Practical Long-Distance Measurement-Device-Independent Quantum Key Distribution By Four-Intensity Protocol.Advanced Quantum Technologies,4.

Hu，Xiao Long,et al."Practical Long-Distance Measurement-Device-Independent Quantum Key Distribution By Four-Intensity Protocol".Advanced Quantum Technologies 4(2021).