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

Abstract The future envisaged global-scale quantum-communication network will comprise various nodes interconnected via optical fibers or free-space channels, depending on the link distance. The free-space segment of such a network should guarantee certain key requirements, such as daytime operation...

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Autores principales:	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
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Physics QC1-999 Electronic computers. Computer science QA75.5-76.95
Acceso en línea:	https://doaj.org/article/9fc81a84d51e4efdb5e2d9bc3b9a1aff
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spelling	oai:doaj.org-article:9fc81a84d51e4efdb5e2d9bc3b9a1aff2021-12-02T17:51:53ZFull daylight quantum-key-distribution at 1550 nm enabled by integrated silicon photonics10.1038/s41534-021-00421-22056-6387https://doaj.org/article/9fc81a84d51e4efdb5e2d9bc3b9a1aff2021-06-01T00:00:00Zhttps://doi.org/10.1038/s41534-021-00421-2https://doaj.org/toc/2056-6387Abstract The future envisaged global-scale quantum-communication network will comprise various nodes interconnected via optical fibers or free-space channels, depending on the link distance. The free-space segment of such a network should guarantee certain key requirements, such as daytime operation and the compatibility with the complementary telecom-based fiber infrastructure. In addition, space-to-ground links will require the capability of designing light and compact quantum devices to be placed in orbit. For these reasons, investigating available solutions matching all the above requirements is still necessary. Here we present a full prototype for daylight quantum key distribution at 1550 nm exploiting an integrated silicon-photonics chip as state encoder. We tested our prototype in the urban area of Padua (Italy) over a 145 m-long free-space link, obtaining a quantum bit error rate around 0.5% and an averaged secret key rate of 30 kbps during a whole sunny day (from 11:00 to 20:00). The developed chip represents a cost-effective solution for portable free-space transmitters and a promising resource to design quantum optical payloads for future satellite missions.M. AvesaniL. CalderaroM. SchiavonA. StancoC. AgnesiA. SantamatoM. ZahidyA. ScriminichG. FolettoG. ContestabileM. ChiesaD. RottaM. ArtigliaA. MontanaroM. RomagnoliV. SorianelloF. VedovatoG. ValloneP. VilloresiNature PortfolioarticlePhysicsQC1-999Electronic computers. Computer scienceQA75.5-76.95ENnpj Quantum Information, Vol 7, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999 Electronic computers. Computer science QA75.5-76.95
spellingShingle	Physics QC1-999 Electronic computers. Computer science QA75.5-76.95 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 Full daylight quantum-key-distribution at 1550 nm enabled by integrated silicon photonics
description	Abstract The future envisaged global-scale quantum-communication network will comprise various nodes interconnected via optical fibers or free-space channels, depending on the link distance. The free-space segment of such a network should guarantee certain key requirements, such as daytime operation and the compatibility with the complementary telecom-based fiber infrastructure. In addition, space-to-ground links will require the capability of designing light and compact quantum devices to be placed in orbit. For these reasons, investigating available solutions matching all the above requirements is still necessary. Here we present a full prototype for daylight quantum key distribution at 1550 nm exploiting an integrated silicon-photonics chip as state encoder. We tested our prototype in the urban area of Padua (Italy) over a 145 m-long free-space link, obtaining a quantum bit error rate around 0.5% and an averaged secret key rate of 30 kbps during a whole sunny day (from 11:00 to 20:00). The developed chip represents a cost-effective solution for portable free-space transmitters and a promising resource to design quantum optical payloads for future satellite missions.
format	article
author	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
author_facet	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
author_sort	M. Avesani
title	Full daylight quantum-key-distribution at 1550 nm enabled by integrated silicon photonics
title_short	Full daylight quantum-key-distribution at 1550 nm enabled by integrated silicon photonics
title_full	Full daylight quantum-key-distribution at 1550 nm enabled by integrated silicon photonics
title_fullStr	Full daylight quantum-key-distribution at 1550 nm enabled by integrated silicon photonics
title_full_unstemmed	Full daylight quantum-key-distribution at 1550 nm enabled by integrated silicon photonics
title_sort	full daylight quantum-key-distribution at 1550 nm enabled by integrated silicon photonics
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/9fc81a84d51e4efdb5e2d9bc3b9a1aff
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Full daylight quantum-key-distribution at 1550 nm enabled by integrated silicon photonics

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