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Coherent-State-Based Twin-Field Quantum Key Distribution
Large-scale quantum communication networks are still a huge challenge due to the rate-distance limit of quantum key distribution (QKD). Recently, twin-field (TF) QKD has been proposed to overcome this limit. Here, we prove that coherent-state-based TF-QKD is a time-reversed entanglement protocol, wh...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6797752/ https://www.ncbi.nlm.nih.gov/pubmed/31624279 http://dx.doi.org/10.1038/s41598-019-50429-0 |
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author | Yin, Hua-Lei Chen, Zeng-Bing |
author_facet | Yin, Hua-Lei Chen, Zeng-Bing |
author_sort | Yin, Hua-Lei |
collection | PubMed |
description | Large-scale quantum communication networks are still a huge challenge due to the rate-distance limit of quantum key distribution (QKD). Recently, twin-field (TF) QKD has been proposed to overcome this limit. Here, we prove that coherent-state-based TF-QKD is a time-reversed entanglement protocol, where the entanglement generation is realized with entanglement swapping operation via an entangled coherent state measurement. We propose a coherent-state-based TF-QKD with optimal secret key rate under symmetric and asymmetric channels by using coherent state and cat state coding. Furthermore, we show that our protocol can be converted to all recent coherent-state-based TF-QKD protocols by using our security proof. By using the entanglement purification with two-way classical communication, we improve the transmission distance of all coherent-state-based TF-QKD protocols. |
format | Online Article Text |
id | pubmed-6797752 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-67977522019-10-25 Coherent-State-Based Twin-Field Quantum Key Distribution Yin, Hua-Lei Chen, Zeng-Bing Sci Rep Article Large-scale quantum communication networks are still a huge challenge due to the rate-distance limit of quantum key distribution (QKD). Recently, twin-field (TF) QKD has been proposed to overcome this limit. Here, we prove that coherent-state-based TF-QKD is a time-reversed entanglement protocol, where the entanglement generation is realized with entanglement swapping operation via an entangled coherent state measurement. We propose a coherent-state-based TF-QKD with optimal secret key rate under symmetric and asymmetric channels by using coherent state and cat state coding. Furthermore, we show that our protocol can be converted to all recent coherent-state-based TF-QKD protocols by using our security proof. By using the entanglement purification with two-way classical communication, we improve the transmission distance of all coherent-state-based TF-QKD protocols. Nature Publishing Group UK 2019-10-17 /pmc/articles/PMC6797752/ /pubmed/31624279 http://dx.doi.org/10.1038/s41598-019-50429-0 Text en © The Author(s) 2019 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 Yin, Hua-Lei Chen, Zeng-Bing Coherent-State-Based Twin-Field Quantum Key Distribution |
title | Coherent-State-Based Twin-Field Quantum Key Distribution |
title_full | Coherent-State-Based Twin-Field Quantum Key Distribution |
title_fullStr | Coherent-State-Based Twin-Field Quantum Key Distribution |
title_full_unstemmed | Coherent-State-Based Twin-Field Quantum Key Distribution |
title_short | Coherent-State-Based Twin-Field Quantum Key Distribution |
title_sort | coherent-state-based twin-field quantum key distribution |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6797752/ https://www.ncbi.nlm.nih.gov/pubmed/31624279 http://dx.doi.org/10.1038/s41598-019-50429-0 |
work_keys_str_mv | AT yinhualei coherentstatebasedtwinfieldquantumkeydistribution AT chenzengbing coherentstatebasedtwinfieldquantumkeydistribution |