Feasibility of satellite-to-ground continuous-variable quantum key distribution

Abstract Establishing secure communication links at a global scale is a major potential application of quantum information science but also extremely challenging for the underlying technology. Although milestone experiments using satellite-to-ground links and exploiting singe-photon encoding for imp...

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Autores principales:	Daniele Dequal, Luis Trigo Vidarte, Victor Roman Rodriguez, Giuseppe Vallone, Paolo Villoresi, Anthony Leverrier, Eleni Diamanti
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/e48336060ae24e5ba14df1c950c78a6f
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spelling	oai:doaj.org-article:e48336060ae24e5ba14df1c950c78a6f2021-12-02T11:56:27ZFeasibility of satellite-to-ground continuous-variable quantum key distribution10.1038/s41534-020-00336-42056-6387https://doaj.org/article/e48336060ae24e5ba14df1c950c78a6f2021-01-01T00:00:00Zhttps://doi.org/10.1038/s41534-020-00336-4https://doaj.org/toc/2056-6387Abstract Establishing secure communication links at a global scale is a major potential application of quantum information science but also extremely challenging for the underlying technology. Although milestone experiments using satellite-to-ground links and exploiting singe-photon encoding for implementing quantum key distribution have shown recently that this goal is achievable, it is still necessary to further investigate practical solutions compatible with classical optical communication systems. Here, we examine the feasibility of establishing secret keys in a satellite-to-ground downlink configuration using continuous-variable encoding, which can be implemented using standard telecommunication components certified for space environment and able to operate at high symbol rates. Considering a realistic channel model and state-of-the-art technology, and exploiting an orbit subdivision technique for mitigating fluctuations in the transmission efficiency, we find positive secret key rates for a low-Earth-orbit scenario, whereas finite-size effects can be a limiting factor for higher orbits. Our analysis determines regions of values for important experimental parameters where secret key exchange is possible and can be used as a guideline for experimental efforts in this direction.Daniele DequalLuis Trigo VidarteVictor Roman RodriguezGiuseppe VallonePaolo VilloresiAnthony LeverrierEleni DiamantiNature PortfolioarticlePhysicsQC1-999Electronic computers. Computer scienceQA75.5-76.95ENnpj Quantum Information, Vol 7, Iss 1, Pp 1-10 (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 Daniele Dequal Luis Trigo Vidarte Victor Roman Rodriguez Giuseppe Vallone Paolo Villoresi Anthony Leverrier Eleni Diamanti Feasibility of satellite-to-ground continuous-variable quantum key distribution
description	Abstract Establishing secure communication links at a global scale is a major potential application of quantum information science but also extremely challenging for the underlying technology. Although milestone experiments using satellite-to-ground links and exploiting singe-photon encoding for implementing quantum key distribution have shown recently that this goal is achievable, it is still necessary to further investigate practical solutions compatible with classical optical communication systems. Here, we examine the feasibility of establishing secret keys in a satellite-to-ground downlink configuration using continuous-variable encoding, which can be implemented using standard telecommunication components certified for space environment and able to operate at high symbol rates. Considering a realistic channel model and state-of-the-art technology, and exploiting an orbit subdivision technique for mitigating fluctuations in the transmission efficiency, we find positive secret key rates for a low-Earth-orbit scenario, whereas finite-size effects can be a limiting factor for higher orbits. Our analysis determines regions of values for important experimental parameters where secret key exchange is possible and can be used as a guideline for experimental efforts in this direction.
format	article
author	Daniele Dequal Luis Trigo Vidarte Victor Roman Rodriguez Giuseppe Vallone Paolo Villoresi Anthony Leverrier Eleni Diamanti
author_facet	Daniele Dequal Luis Trigo Vidarte Victor Roman Rodriguez Giuseppe Vallone Paolo Villoresi Anthony Leverrier Eleni Diamanti
author_sort	Daniele Dequal
title	Feasibility of satellite-to-ground continuous-variable quantum key distribution
title_short	Feasibility of satellite-to-ground continuous-variable quantum key distribution
title_full	Feasibility of satellite-to-ground continuous-variable quantum key distribution
title_fullStr	Feasibility of satellite-to-ground continuous-variable quantum key distribution
title_full_unstemmed	Feasibility of satellite-to-ground continuous-variable quantum key distribution
title_sort	feasibility of satellite-to-ground continuous-variable quantum key distribution
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/e48336060ae24e5ba14df1c950c78a6f
work_keys_str_mv	AT danieledequal feasibilityofsatellitetogroundcontinuousvariablequantumkeydistribution AT luistrigovidarte feasibilityofsatellitetogroundcontinuousvariablequantumkeydistribution AT victorromanrodriguez feasibilityofsatellitetogroundcontinuousvariablequantumkeydistribution AT giuseppevallone feasibilityofsatellitetogroundcontinuousvariablequantumkeydistribution AT paolovilloresi feasibilityofsatellitetogroundcontinuousvariablequantumkeydistribution AT anthonyleverrier feasibilityofsatellitetogroundcontinuousvariablequantumkeydistribution AT elenidiamanti feasibilityofsatellitetogroundcontinuousvariablequantumkeydistribution
_version_	1718394841521455104

Feasibility of satellite-to-ground continuous-variable quantum key distribution

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