Open AccessImproved statistical fluctuation analysis for measurement-device-independent quantum key distribution with four-intensity decoy-state method
Author(s) -
Chen-Chen Mao,
Xing-Yu Zhou,
Jian-Rong Zhu,
Chunhui Zhang,
Qin Wang
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.013289
Subject(s) - quantum key distribution , chernoff bound , bb84 , computer science , statistical fluctuations , key (lock) , key generation , quantum cryptography , security analysis , gaussian , encryption , algorithm , quantum , statistical physics , physics , quantum information , quantum mechanics , computer network , computer security
Recently Zhang et al [ Phys. Rev. A95, 012333 (2017)] developed a new approach to estimate the failure probability for the decoy-state BB84 QKD system when taking finite-size key effect into account, which offers security comparable to Chernoff bound, while results in an improved key rate and transmission distance. Based on Zhang et al's work, now we extend this approach to the case of the measurement-device-independent quantum key distribution (MDI-QKD), and for the first time implement it onto the four-intensity decoy-state MDI-QKD system. Moreover, through utilizing joint constraints and collective error-estimation techniques, we can obviously increase the performance of practical MDI-QKD systems compared with either three- or four-intensity decoy-state MDI-QKD using Chernoff bound analysis, and achieve much higher level security compared with those applying Gaussian approximation analysis.