Free‐Space Time‐Bin Encoded Quantum Key Distribution from Near‐ to Mid‐Infrared Wavelengths

2025/08/18 by Claudia De Lazzari, De Lazzari, Claudia, Tecla Gabbrielli +21
Computer Science · Physics and Astronomy · Engineering · #Quantum Information and Cryptography #Quantum optics and atomic interactions #Photonic and Optical Devices

paper · pdf · doi:10.1002/qute.202500867

Abstract

ABSTRACT Quantum technologies play a central role in establishing new ways of quantum‐secured communication. This work investigates free‐space quantum communication and explores the advantage of implementing quantum key distribution (QKD) with weak coherent states produced by a light source in the mid‐infrared (). Time‐bin encoded quantum key distribution is simulated, and it is demonstrated that a free‐space QKD link operating in the mid‐infrared outperforms configurations based on conventional near‐infrared wavelengths under various weather scenarios, with a particular significance in adverse meteorological conditions.

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