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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
Tags
quantum key distribution
silicon photonics
free-space link
quantum bit error rate
secret key rate
portable transmitters
satellite missions

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