Four-dimensional entanglement distribution over 100 km
Abstract 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-d...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2018-01-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-017-19078-z |
| _version_ | 1818345652197785600 |
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| author | Takuya Ikuta Hiroki Takesue |
| author_facet | Takuya Ikuta Hiroki Takesue |
| author_sort | Takuya Ikuta |
| collection | DOAJ |
| description | Abstract 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. |
| first_indexed | 2024-12-13T17:05:46Z |
| format | Article |
| id | doaj.art-a0ef542c878b46768ee487e4fdab4217 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-12-13T17:05:46Z |
| publishDate | 2018-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-a0ef542c878b46768ee487e4fdab42172022-12-21T23:37:42ZengNature PortfolioScientific Reports2045-23222018-01-01811710.1038/s41598-017-19078-zFour-dimensional entanglement distribution over 100 kmTakuya Ikuta0Hiroki Takesue1NTT Basic Research Laboratories, NTT Corporation, 3-1, Morinosato WakamiyaNTT Basic Research Laboratories, NTT Corporation, 3-1, Morinosato WakamiyaAbstract 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.https://doi.org/10.1038/s41598-017-19078-z |
| spellingShingle | Takuya Ikuta Hiroki Takesue Four-dimensional entanglement distribution over 100 km Scientific Reports |
| 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 |
| url | https://doi.org/10.1038/s41598-017-19078-z |
| work_keys_str_mv | AT takuyaikuta fourdimensionalentanglementdistributionover100km AT hirokitakesue fourdimensionalentanglementdistributionover100km |