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A deterministic detector for vector vortex states

Encoding information in high-dimensional degrees of freedom of photons has led to new avenues in various quantum protocols such as communication and information processing. Yet to fully benefit from the increase in dimension requires a deterministic detection system, e.g., to reduce dimension depend...

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Autores principales: Ndagano, Bienvenu, Nape, Isaac, Perez-Garcia, Benjamin, Scholes, Stirling, Hernandez-Aranda, Raul I., Konrad, Thomas, Lavery, Martin P. J., Forbes, Andrew
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5654751/
https://www.ncbi.nlm.nih.gov/pubmed/29066715
http://dx.doi.org/10.1038/s41598-017-12739-z
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author Ndagano, Bienvenu
Nape, Isaac
Perez-Garcia, Benjamin
Scholes, Stirling
Hernandez-Aranda, Raul I.
Konrad, Thomas
Lavery, Martin P. J.
Forbes, Andrew
author_facet Ndagano, Bienvenu
Nape, Isaac
Perez-Garcia, Benjamin
Scholes, Stirling
Hernandez-Aranda, Raul I.
Konrad, Thomas
Lavery, Martin P. J.
Forbes, Andrew
author_sort Ndagano, Bienvenu
collection PubMed
description Encoding information in high-dimensional degrees of freedom of photons has led to new avenues in various quantum protocols such as communication and information processing. Yet to fully benefit from the increase in dimension requires a deterministic detection system, e.g., to reduce dimension dependent photon loss in quantum key distribution. Recently, there has been a growing interest in using vector vortex modes, spatial modes of light with entangled degrees of freedom, as a basis for encoding information. However, there is at present no method to detect these non-separable states in a deterministic manner, negating the benefit of the larger state space. Here we present a method to deterministically detect single photon states in a four dimensional space spanned by vector vortex modes with entangled polarisation and orbital angular momentum degrees of freedom. We demonstrate our detection system with vector vortex modes from the |[Formula: see text] | = 1 and |[Formula: see text] | = 10 subspaces using classical and weak coherent states and find excellent detection fidelities for both pure and superposition vector states. This work opens the possibility to increase the dimensionality of the state-space used for encoding information while maintaining deterministic detection and will be invaluable for long distance classical and quantum communication.
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spelling pubmed-56547512017-10-31 A deterministic detector for vector vortex states Ndagano, Bienvenu Nape, Isaac Perez-Garcia, Benjamin Scholes, Stirling Hernandez-Aranda, Raul I. Konrad, Thomas Lavery, Martin P. J. Forbes, Andrew Sci Rep Article Encoding information in high-dimensional degrees of freedom of photons has led to new avenues in various quantum protocols such as communication and information processing. Yet to fully benefit from the increase in dimension requires a deterministic detection system, e.g., to reduce dimension dependent photon loss in quantum key distribution. Recently, there has been a growing interest in using vector vortex modes, spatial modes of light with entangled degrees of freedom, as a basis for encoding information. However, there is at present no method to detect these non-separable states in a deterministic manner, negating the benefit of the larger state space. Here we present a method to deterministically detect single photon states in a four dimensional space spanned by vector vortex modes with entangled polarisation and orbital angular momentum degrees of freedom. We demonstrate our detection system with vector vortex modes from the |[Formula: see text] | = 1 and |[Formula: see text] | = 10 subspaces using classical and weak coherent states and find excellent detection fidelities for both pure and superposition vector states. This work opens the possibility to increase the dimensionality of the state-space used for encoding information while maintaining deterministic detection and will be invaluable for long distance classical and quantum communication. Nature Publishing Group UK 2017-10-24 /pmc/articles/PMC5654751/ /pubmed/29066715 http://dx.doi.org/10.1038/s41598-017-12739-z Text en © The Author(s) 2017 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
Ndagano, Bienvenu
Nape, Isaac
Perez-Garcia, Benjamin
Scholes, Stirling
Hernandez-Aranda, Raul I.
Konrad, Thomas
Lavery, Martin P. J.
Forbes, Andrew
A deterministic detector for vector vortex states
title A deterministic detector for vector vortex states
title_full A deterministic detector for vector vortex states
title_fullStr A deterministic detector for vector vortex states
title_full_unstemmed A deterministic detector for vector vortex states
title_short A deterministic detector for vector vortex states
title_sort deterministic detector for vector vortex states
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5654751/
https://www.ncbi.nlm.nih.gov/pubmed/29066715
http://dx.doi.org/10.1038/s41598-017-12739-z
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