We propose a method to prepare different non-Poissonian signal pulses from sources of Poissonian photon number distribution, using only linear optical elements and threshold photon detectors. This method allows a simple passive preparation of decoy states for quantum key distribution. We show that the resulting key rates are comparable with the performance of active choices of intensities of Poissonian signals.
© 2009 Optical Society of America
Original Manuscript: July 7, 2009
Manuscript Accepted: August 9, 2009
Published: October 15, 2009
Marcos Curty, Tobias Moroder, Xiongfeng Ma, and Norbert Lütkenhaus, "Non-Poissonian statistics from Poissonian light sources with application to passive decoy state quantum key distribution," Opt. Lett. 34, 3238-3240 (2009)