High-dimensional coherent one-way quantum key distribution
Abstract High-dimensional quantum key distribution (QKD) offers secure communication with key rates that surpass those of QKD protocols utilizing two-dimensional encoding. However, existing high-dimensional QKD protocols require additional experimental resources, such as multiport interferometers an...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2025-01-01
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| Series: | npj Quantum Information |
| Online Access: | https://doi.org/10.1038/s41534-025-00965-7 |
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| _version_ | 1832571444323680256 |
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| author | Kfir Sulimany Guy Pelc Rom Dudkiewicz Simcha Korenblit Hagai S. Eisenberg Yaron Bromberg Michael Ben-Or |
| author_facet | Kfir Sulimany Guy Pelc Rom Dudkiewicz Simcha Korenblit Hagai S. Eisenberg Yaron Bromberg Michael Ben-Or |
| author_sort | Kfir Sulimany |
| collection | DOAJ |
| description | Abstract High-dimensional quantum key distribution (QKD) offers secure communication with key rates that surpass those of QKD protocols utilizing two-dimensional encoding. However, existing high-dimensional QKD protocols require additional experimental resources, such as multiport interferometers and multiple detectors, thereby increasing the cost of high-dimensional systems and limiting their use. We introduce and analyze a high-dimensional QKD protocol that requires only standard two-dimensional hardware. We provide security analysis against individual and coherent attacks, establishing upper and lower bounds on the secure key rates. We tested our protocol on a standard two-dimensional QKD system over a 40 km fiber link, achieving a twofold increase in secure key rate compared to the standard two-dimensional coherent one-way protocol, without any hardware modifications. This work offers a significant improvement in the performance of already deployed QKD systems through simple software updates and holds broad applicability across various QKD schemes, making high-dimensional QKD practical for widespread use. |
| format | Article |
| id | doaj-art-592bfa76876d4d3aa8073804c82a3619 |
| institution | Kabale University |
| issn | 2056-6387 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | npj Quantum Information |
| spelling | doaj-art-592bfa76876d4d3aa8073804c82a36192025-02-02T12:35:47ZengNature Portfolionpj Quantum Information2056-63872025-01-0111111410.1038/s41534-025-00965-7High-dimensional coherent one-way quantum key distributionKfir Sulimany0Guy Pelc1Rom Dudkiewicz2Simcha Korenblit3Hagai S. Eisenberg4Yaron Bromberg5Michael Ben-Or6Racah Institute of Physics, The Hebrew UniversityRacah Institute of Physics, The Hebrew UniversitySchool of Computer Science & Engineering, The Hebrew UniversityRacah Institute of Physics, The Hebrew UniversityRacah Institute of Physics, The Hebrew UniversityRacah Institute of Physics, The Hebrew UniversitySchool of Computer Science & Engineering, The Hebrew UniversityAbstract High-dimensional quantum key distribution (QKD) offers secure communication with key rates that surpass those of QKD protocols utilizing two-dimensional encoding. However, existing high-dimensional QKD protocols require additional experimental resources, such as multiport interferometers and multiple detectors, thereby increasing the cost of high-dimensional systems and limiting their use. We introduce and analyze a high-dimensional QKD protocol that requires only standard two-dimensional hardware. We provide security analysis against individual and coherent attacks, establishing upper and lower bounds on the secure key rates. We tested our protocol on a standard two-dimensional QKD system over a 40 km fiber link, achieving a twofold increase in secure key rate compared to the standard two-dimensional coherent one-way protocol, without any hardware modifications. This work offers a significant improvement in the performance of already deployed QKD systems through simple software updates and holds broad applicability across various QKD schemes, making high-dimensional QKD practical for widespread use.https://doi.org/10.1038/s41534-025-00965-7 |
| spellingShingle | Kfir Sulimany Guy Pelc Rom Dudkiewicz Simcha Korenblit Hagai S. Eisenberg Yaron Bromberg Michael Ben-Or High-dimensional coherent one-way quantum key distribution npj Quantum Information |
| title | High-dimensional coherent one-way quantum key distribution |
| title_full | High-dimensional coherent one-way quantum key distribution |
| title_fullStr | High-dimensional coherent one-way quantum key distribution |
| title_full_unstemmed | High-dimensional coherent one-way quantum key distribution |
| title_short | High-dimensional coherent one-way quantum key distribution |
| title_sort | high dimensional coherent one way quantum key distribution |
| url | https://doi.org/10.1038/s41534-025-00965-7 |
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