Four-dimensional entanglement distribution over 100 km

Abstract High-dimensional quantum entanglement can enrich the functionality of quantum information processing. For example, it can enhance the channel capacity for linear optic superdense coding and decrease the error rate threshold of quantum key distribution. Long-distance distribution of a high-d...

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Autores principales:	Takuya Ikuta, Hiroki Takesue
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/a0ef542c878b46768ee487e4fdab4217
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spelling	oai:doaj.org-article:a0ef542c878b46768ee487e4fdab42172021-12-02T15:08:40ZFour-dimensional entanglement distribution over 100 km10.1038/s41598-017-19078-z2045-2322https://doaj.org/article/a0ef542c878b46768ee487e4fdab42172018-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-19078-zhttps://doaj.org/toc/2045-2322Abstract High-dimensional quantum entanglement can enrich the functionality of quantum information processing. For example, it can enhance the channel capacity for linear optic superdense coding and decrease the error rate threshold of quantum key distribution. Long-distance distribution of a high-dimensional entanglement is essential for such advanced quantum communications over a communications network. Here, we show a long-distance distribution of a four-dimensional entanglement. We employ time-bin entanglement, which is suitable for a fibre transmission, and implement scalable measurements for the high-dimensional entanglement using cascaded Mach-Zehnder interferometers. We observe that a pair of time-bin entangled photons has more than 1 bit of secure information capacity over 100 km. Our work constitutes an important step towards secure and dense quantum communications in a large Hilbert space.Takuya IkutaHiroki TakesueNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-7 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Takuya Ikuta Hiroki Takesue Four-dimensional entanglement distribution over 100 km
description	Abstract High-dimensional quantum entanglement can enrich the functionality of quantum information processing. For example, it can enhance the channel capacity for linear optic superdense coding and decrease the error rate threshold of quantum key distribution. Long-distance distribution of a high-dimensional entanglement is essential for such advanced quantum communications over a communications network. Here, we show a long-distance distribution of a four-dimensional entanglement. We employ time-bin entanglement, which is suitable for a fibre transmission, and implement scalable measurements for the high-dimensional entanglement using cascaded Mach-Zehnder interferometers. We observe that a pair of time-bin entangled photons has more than 1 bit of secure information capacity over 100 km. Our work constitutes an important step towards secure and dense quantum communications in a large Hilbert space.
format	article
author	Takuya Ikuta Hiroki Takesue
author_facet	Takuya Ikuta Hiroki Takesue
author_sort	Takuya Ikuta
title	Four-dimensional entanglement distribution over 100 km
title_short	Four-dimensional entanglement distribution over 100 km
title_full	Four-dimensional entanglement distribution over 100 km
title_fullStr	Four-dimensional entanglement distribution over 100 km
title_full_unstemmed	Four-dimensional entanglement distribution over 100 km
title_sort	four-dimensional entanglement distribution over 100 km
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/a0ef542c878b46768ee487e4fdab4217
work_keys_str_mv	AT takuyaikuta fourdimensionalentanglementdistributionover100km AT hirokitakesue fourdimensionalentanglementdistributionover100km
_version_	1718388077052821504

Four-dimensional entanglement distribution over 100 km

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