Decoy-State Quantum Key Distribution with Nonclassical Light Generated   in a One-dimensional Waveguide
  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. 
Huaixiu Zheng, Daniel J. Gauthier, and Harold U. Baranger
quant-ph cond-mat.mes-hall