We investigate a decoy-state quantum key distribution (QKD) scheme with a sub-Poissonian single-photon source, which is generated on demand by scattering a coherent state off a two-level system in a one-dimensional waveguide. We show that, compared to coherent state decoy-state QKD, there is a two-fold increase of the key generation rate. Furthermore, the performance is shown to be robust against both parameter variations and loss effects of the system.
@article{arxiv.1210.1113,
title = {Decoy-State Quantum Key Distribution with Nonclassical Light Generated in a One-dimensional Waveguide},
author = {Huaixiu Zheng and Daniel J. Gauthier and Harold U. Baranger},
journal= {arXiv preprint arXiv:1210.1113},
year = {2013}
}