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Four-dimensional entanglement distribution over 100 km

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-dimensiona...

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Autores principales: Ikuta, Takuya, Takesue, Hiroki
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5770424/
https://www.ncbi.nlm.nih.gov/pubmed/29339764
http://dx.doi.org/10.1038/s41598-017-19078-z
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author Ikuta, Takuya
Takesue, Hiroki
author_facet Ikuta, Takuya
Takesue, Hiroki
author_sort Ikuta, Takuya
collection PubMed
description 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.
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spelling pubmed-57704242018-01-26 Four-dimensional entanglement distribution over 100 km Ikuta, Takuya Takesue, Hiroki Sci Rep Article 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. Nature Publishing Group UK 2018-01-16 /pmc/articles/PMC5770424/ /pubmed/29339764 http://dx.doi.org/10.1038/s41598-017-19078-z Text en © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Ikuta, Takuya
Takesue, Hiroki
Four-dimensional entanglement distribution over 100 km
title 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_short Four-dimensional entanglement distribution over 100 km
title_sort four-dimensional entanglement distribution over 100 km
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5770424/
https://www.ncbi.nlm.nih.gov/pubmed/29339764
http://dx.doi.org/10.1038/s41598-017-19078-z
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