Features of the Photon Pulse Detection Algorithm in the Quantum Key Distribution System
Anton Pljonkin
TL;DR
This paper investigates a fiber-optic quantum key distribution system with phase-encoded photon states, proposing a modernized photon pulse detection algorithm that accounts for detector dead time to improve synchronization accuracy.
Contribution
It introduces a new photon pulse detection algorithm considering detector dead time and provides an analytical approach for synchronization in quantum key distribution systems.
Findings
Analytical expressions for detection probability are validated.
The proposed algorithm improves detection accuracy during synchronization.
The method enhances the reliability of quantum key distribution systems.
Abstract
A two-pass fiber-optic quantum key distribution system with phase-encoded photon states in synchronization mode has been investigated. The possibility of applying the analytical expressions for the calculation of the correct detection probability of the signal time window at synchronization has been proved. A modernized algorithm of photon pulse detection, taking into account the dead time of the single-photon avalanche photodiode was proposed. The method of engineering an optical pulse detection process during the synchronization in a quantum key distribution system has been offered.
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