Paper Info
Title
Sending Or Not-Sending Twin-Field Quantum Key Distribution With Flawed And Leaky Sources
Abstract
Twin-field quantum key distribution (TF-QKD) has attracted considerable attention and developed rapidly due to its ability to surpass the fundamental rate-distance limit of QKD. However, the device imperfections may compromise its practical implementations. The goal of this paper is to make it robust against the state preparation flaws (SPFs) and side channels at the light source. We adopt the sending or not-sending (SNS) TF-QKD protocol to accommodate the SPFs and multiple optical modes in the emitted states. We analyze that the flaws of the phase modulation can be overcome by regarding the deviation of the phase as phase noise and eliminating it with the post-selection of phase. To overcome the side channels, we extend the generalized loss-tolerant (GLT) method to the four-intensity decoy-state SNS protocol. Remarkably, by decomposing of the two-mode single-photon states, the phase error rate can be estimated with only four parameters. The practical security of the SNS protocol with flawed and leaky source can be guaranteed. Our results might constitute a crucial step towards guaranteeing the practical implementation of the SNS protocol.
Year
DOI
Venue
2021
10.3390/e23091103
ENTROPY
Keywords
DocType
Volume
twin-field, practical security, loss-tolerant
Journal
23
Issue
ISSN
Citations 
9
1099-4300
0
PageRank 
References 
Authors
0.34
0
8
Name
Order
Citations
PageRank
Yi-Fei Lu100.34
Mu-Sheng Jiang200.34
Yang Wang339461.44
Xiao-Xu Zhang400.34
Fan Liu563.33
Chun Zhou600.34
Hong-Wei Li700.68
Wan-Su Bao800.34