Patent ID: 7391867
Filing Date: 2008-06-24
Classification: H04L

Abstract:
1. A method of visually displaying statistical information relating to the operation of a quantum key distribution (QKD) system having first and second single-photon detectors (SPDs) and first and second modulators each having two or more possible modulator states, comprising: exchanging modulated quantum photons between first and second QKD stations for each combination of modulator states; in a programmable computer having a computer-readable medium, collecting and storing data on the number of quantum photon counts obtained in each of the first and second SPDs for each modulator state combination; based on said stored data, defining a statistical region for each modulator state combination based on said data; and displaying, on a graphical display unit, graphical representations of the statistical regions on a graph having indicia indicating ideal locations for the statistical regions.