Mode-pairing quantum key distribution (MP-QKD) is a potential protocol that is not only immune to all possible detector side channel attacks, but also breaks the repeaterless rate-transmittance bound without needing global phase locking. Here we analyze the finite-key effect for the MP-QKD protocol with rigorous security proof against general attacks. Moreover, we propose a six-state MP-QKD protocol and analyze its finite-key effect. The results show that the original protocol can break the repeaterless rate-transmittance bound with a typical finite number of pulses in practice. And our six-state protocol can improve the secret key rate significantly in long distance cases.
@article{arxiv.2302.13481,
title = {Tight finite-key analysis for mode-pairing quantum key distribution},
author = {Ze-Hao Wang and Zhen-Qiang Yin and Shuang Wang and Rong Wang and Feng-Yu Lu and Wei Chen and De-Yong He and Guang-Can Guo and Zheng-Fu Han},
journal= {arXiv preprint arXiv:2302.13481},
year = {2023}
}