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Subcarrier wave continuous variable quantum key distribution with discrete modulation: mathematical model and finite-key analysis
In this paper we report a continuous-variable quantum key distribution protocol using multimode coherent states generated on subcarrier frequencies of the optical spectrum. We propose a coherent detection scheme where power from a carrier wave is used as a local oscillator. We compose a mathematical...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7308325/ https://www.ncbi.nlm.nih.gov/pubmed/32572271 http://dx.doi.org/10.1038/s41598-020-66948-0 |
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author | Samsonov, E. Goncharov, R. Gaidash, A. Kozubov, A. Egorov, V. Gleim, A. |
author_facet | Samsonov, E. Goncharov, R. Gaidash, A. Kozubov, A. Egorov, V. Gleim, A. |
author_sort | Samsonov, E. |
collection | PubMed |
description | In this paper we report a continuous-variable quantum key distribution protocol using multimode coherent states generated on subcarrier frequencies of the optical spectrum. We propose a coherent detection scheme where power from a carrier wave is used as a local oscillator. We compose a mathematical model of the proposed scheme and perform its security analysis in the finite-size regime using fully quantum asymptotic equipartition property technique. We calculate a lower bound on the secret key rate for the system under the assumption that the quantum channel noise is negligible compared to detector dark counts, and an eavesdropper is restricted to collective attacks. Our calculation shows that the current realistic system implementation would allow distributing secret keys over channels with losses up to 9 dB. |
format | Online Article Text |
id | pubmed-7308325 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-73083252020-06-23 Subcarrier wave continuous variable quantum key distribution with discrete modulation: mathematical model and finite-key analysis Samsonov, E. Goncharov, R. Gaidash, A. Kozubov, A. Egorov, V. Gleim, A. Sci Rep Article In this paper we report a continuous-variable quantum key distribution protocol using multimode coherent states generated on subcarrier frequencies of the optical spectrum. We propose a coherent detection scheme where power from a carrier wave is used as a local oscillator. We compose a mathematical model of the proposed scheme and perform its security analysis in the finite-size regime using fully quantum asymptotic equipartition property technique. We calculate a lower bound on the secret key rate for the system under the assumption that the quantum channel noise is negligible compared to detector dark counts, and an eavesdropper is restricted to collective attacks. Our calculation shows that the current realistic system implementation would allow distributing secret keys over channels with losses up to 9 dB. Nature Publishing Group UK 2020-06-22 /pmc/articles/PMC7308325/ /pubmed/32572271 http://dx.doi.org/10.1038/s41598-020-66948-0 Text en © The Author(s) 2020 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 Samsonov, E. Goncharov, R. Gaidash, A. Kozubov, A. Egorov, V. Gleim, A. Subcarrier wave continuous variable quantum key distribution with discrete modulation: mathematical model and finite-key analysis |
title | Subcarrier wave continuous variable quantum key distribution with discrete modulation: mathematical model and finite-key analysis |
title_full | Subcarrier wave continuous variable quantum key distribution with discrete modulation: mathematical model and finite-key analysis |
title_fullStr | Subcarrier wave continuous variable quantum key distribution with discrete modulation: mathematical model and finite-key analysis |
title_full_unstemmed | Subcarrier wave continuous variable quantum key distribution with discrete modulation: mathematical model and finite-key analysis |
title_short | Subcarrier wave continuous variable quantum key distribution with discrete modulation: mathematical model and finite-key analysis |
title_sort | subcarrier wave continuous variable quantum key distribution with discrete modulation: mathematical model and finite-key analysis |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7308325/ https://www.ncbi.nlm.nih.gov/pubmed/32572271 http://dx.doi.org/10.1038/s41598-020-66948-0 |
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