We introduce a two-step error correction scheme for reconciliation in continuous-variable quantum key distribution systems. Using this scheme, it is possible to use error correction codes with small blocklengths (1000 bits), increasing secret key rates at a distance of 140km by up to 7.3 times.
@article{arxiv.2507.03529,
title = {Short Blocklength Error Correction Codes for Continuous-Variable Quantum Key Distribution},
author = {Kadir Gümüş and João dos Reis Frazão and Boris Škorić and Gabriele Liga and Aaron Albores-Mejia and Thomas Bradley and Chigo Okonkwo},
journal= {arXiv preprint arXiv:2507.03529},
year = {2025}
}