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Opt Lett. 2009 Oct 15;34(20):3238-40. doi: 10.1364/OL.34.003238.

Non-Poissonian statistics from Poissonian light sources with application to passive decoy state quantum key distribution.

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1
ETSI Telecomunicaci├│n, Department of Signal Theory and Communications, University of Vigo,E-36310 Vigo (Pontevedra), Spain. mcurty@com.uvigo.es

Abstract

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.

PMID:
19838285
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