High-bit-rate continuous-variable quantum key distribution
Paul Jouguet, David Elkouss, Sébastien Kunz-Jacques · Physical Review A · 2014
Here, we demonstrate that a practical continuous-variable quantum key distribution (QKD) protocol relying on the Gaussian modulation of coherent states features secret key rates that cannot be achieved with standard qubit discrete-variable QKD protocols. Notably, we report a practical postprocessing that allows us to extract more than 1 bit of secret key per channel use.