Dynamic model of an optical channel for a quantum key distribution system in MATLAB Simulink

Abstract

Relevance. Improving post-processing algorithms for key information transmitted via optical channels, as well as planning the architecture of quantum networks require realistic data. Obtaining such data through full-scale or semi-physical experiments is challenging and resource-intensive. An alternative solution is the use of a simulation-based channel model, the development of which is the focus of this work. Aim. To explore the feasibility of developing a practically applicable dynamic simulation model of the optical channel in a quantum key distribution system, taking into account the distortion of light pulses in a fiber-optic line. Object. Quantum channel of the quantum key distribution systems. Methods. Mathematical framework of radio signal theory combined with structural modeling in the MATLAB Simulink environment. Results. A model of a quantum channel of a QKD system has been implemented, validated and made publicly available.

Keywords

• quantum key distribution
• matlab simulink
• quantum channel
• fiber-optic communication line
• chromatic dispersion