Measurement-device-independent quantum key distribution with source state errors and statistical fluctuation

TL;DR

This paper presents a method to accurately calculate the secure key rate in a four-intensity decoy-state MDI-QKD protocol, accounting for source errors and statistical fluctuations without unverifiable assumptions.

Contribution

It introduces a calculation approach that considers all imperfections in the protocol using only a few source parameters, enhancing security analysis.

Findings

Secure key rate calculation considering source errors and fluctuations

Method relies on a limited set of source parameters

No unverifiable error assumptions used

Abstract

We show how to calculate the secure final key rate in the four-intensity decoy-state MDI-QKD protocol with both source errors and statistical fluctuations with a certain failure probability. Our results rely only on the range of only a few parameters in the source state. All imperfections in this protocol have been taken into consideration without any unverifiable error patterns.