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.
© 2013 Optical Society of America
Original Manuscript: October 5, 2012
Revised Manuscript: November 29, 2012
Manuscript Accepted: January 16, 2013
Published: February 21, 2013
Huaixiu Zheng, Daniel J. Gauthier, and Harold U. Baranger, "Decoy-state quantum key distribution with nonclassical light generated in a one-dimensional waveguide," Opt. Lett. 38, 622-624 (2013)