Measurement-device-independent quantum key distribution protocol with phase post-selection

Jiang，Cong1,2; Hu，Xiao Long3; Yu，Zong Wen4; Wang，Xiang Bin1,2,5,6,7

2022-07-01

10.1364/PRJ.445617

Photonics Research   Impact Factor & Quartile

2327-9125

Measurement-device-independent quantum key distribution (MDI-QKD) protocol can remove all the loopholes of the detection devices and, thus, has attracted much attention. Based on the technique of single-photon interference, we propose a modified MDI-QKD protocol with phase post-selection. We prove the security of the announcement of the private phases in the X basis and show how to apply the phase post-selection method to the double-scanning four-intensity MDI-QKD protocol. The numerical results show that the phase postselection method can significantly improve the key rates at all distances. In the double-scanning method, two parameters need to be scanned in the calculation of the final key rate, and the global parameter optimization is pretty time-consuming. We propose an accelerated method that can greatly reduce the running time of the global parameter optimization program. This makes the method practically useful in an unstable channel. (C) 2022 Chinese Laser Press.

SCI ; EI

English

Others

Ministry of Science and Technology of China through the National Key Research and Development Program of China[2020YFA0309701] ; National Natural Science Foundation of China["12104184","12174215","11974204","12147107"] ; Shandong Provincial Natural Science Foundation[ZR2021LLZ007] ; Key R&D Plan of Shandong Province[2021ZDPT01] ; Open Research Fund Program of the State Key Laboratory of Low-Dimensional Quantum Physics[KF202110]

Optics

Optics

WOS:000823112600020

CHINESE LASER PRESS

20222912361747

Particle beams ; Quantum cryptography

Numerical Methods:921.6 ; High Energy Physics:932.1

2-s2.0-85133836141

Web of Science

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

Jiang，Cong,Hu，Xiao Long,Yu，Zong Wen,et al. Measurement-device-independent quantum key distribution protocol with phase post-selection[J]. Photonics Research,2022,10(7):1703-1711.

Jiang，Cong,Hu，Xiao Long,Yu，Zong Wen,&Wang，Xiang Bin.(2022).Measurement-device-independent quantum key distribution protocol with phase post-selection.Photonics Research,10(7),1703-1711.

Jiang，Cong,et al."Measurement-device-independent quantum key distribution protocol with phase post-selection".Photonics Research 10.7(2022):1703-1711.