Engineering and Technology

Full daylight quantum-key-distribution at 1550 nm enabled by integrated silicon photonics

M. Avesani, L. Calderaro, et al.

Discover a groundbreaking prototype for daylight quantum key distribution (QKD) using integrated silicon-photonics technology, developed by a team of innovative researchers from the University of Padova and beyond. Achieving remarkable performance in real-world conditions, this research opens doors to cost-effective quantum optical applications, particularly in satellite missions.

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Abstract

This paper presents a prototype for daylight quantum key distribution (QKD) at 1550 nm using an integrated silicon-photonics chip as a state encoder. The prototype was tested over a 145 m free-space link, achieving a quantum bit error rate around 0.5% and an average secret key rate of 30 kbps during a sunny day. The chip offers a cost-effective solution for portable free-space transmitters and is promising for quantum optical payloads in satellite missions.

Publisher

npj Quantum Information

Published On

Jun 08, 2021

Authors

M. Avesani, L. Calderaro, M. Schiavon, A. Stanco, C. Agnesi, A. Santamato, M. Zahidy, A. Scriminich, G. Foletto, G. Contestabile, M. Chiesa, D. Rotta, M. Artiglia, A. Montanaro, M. Romagnoli, V. Sorianello, F. Vedovato, G. Vallone, P. Villoresi

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