Repeaterless quantum key distribution with efficient finite-key analysis overcoming the rate-distance limit

The recently proposed Twin Field QKD protocol allows to beat the linear scaling of the key rate with the channel losses. Here, the authors extend it including a full security proof in the finite block size regime, allowing for practically-relevant secure key rates.

Bibliographic Details
Main Authors: Kento Maeda, Toshihiko Sasaki, Masato Koashi
Format: Article
Language:English
Published: Nature Publishing Group 2019-07-01
Series:Nature Communications
Online Access:https://doi.org/10.1038/s41467-019-11008-z
Description
Summary:The recently proposed Twin Field QKD protocol allows to beat the linear scaling of the key rate with the channel losses. Here, the authors extend it including a full security proof in the finite block size regime, allowing for practically-relevant secure key rates.
ISSN:2041-1723