Work

Low-complexity CV-QKD system with optical pilot-tone local oscillator synchronization

Year: 2025

Type: article

Abstract: This study presents a comprehensive simulation-based analysis of optical pilot tone generation for local oscillator synchronization in continuous-variable quantum key distribution (CV-QKD) systems using Gaussian-modulated (GM) coherent states. We compare system performance when the pilot tone is generated either electrically or optically, examining the effects of key parameters such as pilot tone power, laser linewidth, digital-to-analog converter resolution, and link distance. The results provide insights into pilot tone generation strategies that enhance robustness while reducing the implementation complexity of GM CV-QKD systems.

Source: Optics Express

DOI: 10.1364/oe.578763

Authors: Samael Sarmiento, Jeison Tabares, Sebastian Etcheverry

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270

Funders: European Commission, HORIZON EUROPE Framework Programme, Agencia Estatal de Investigación, HORIZON EUROPE European Innovation Council