Decoy-state quantum key distribution with both source errors and statistical fluctuations

TL;DR

This paper presents a method to accurately estimate single photon counts in decoy-state quantum key distribution considering source errors and statistical fluctuations, relying only on bounds of certain pulse parameters.

Contribution

It introduces a calculation approach that accounts for both source errors and statistical fluctuations using minimal parameter bounds, enhancing the reliability of quantum key distribution.

Findings

Accurate estimation of single photon counts under realistic conditions.

Method accounts for source errors and statistical fluctuations.

Relies on bounds of a few key pulse parameters.

Abstract

We show how to calculate the fraction of single photon counts of the 3-intensity decoy-state quantum cryptography faithfully with both statistical fluctuations and source errors. Our results only rely on the bound values of a few parameters of the states of pulses.