Beating the repeaterless bound with adaptive measurement-device-independent quantum key distribution
Surpassing the repeaterless bound is a crucial task on the way towards realizing long-distance quantum key distribution. In this paper, we focus on the protocol proposed by Azuma et al (2015 Nat. Commun. 6 10171), which can beat this bound with idealized devices. We investigate the robustness of thi...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2019-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/ab54aa |
| _version_ | 1797750389008760832 |
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| author | Róbert Trényi Koji Azuma Marcos Curty |
| author_facet | Róbert Trényi Koji Azuma Marcos Curty |
| author_sort | Róbert Trényi |
| collection | DOAJ |
| description | Surpassing the repeaterless bound is a crucial task on the way towards realizing long-distance quantum key distribution. In this paper, we focus on the protocol proposed by Azuma et al (2015 Nat. Commun. 6 10171), which can beat this bound with idealized devices. We investigate the robustness of this protocol against imperfections in realistic setups, particularly the multiple-photon pair components emitted by practical entanglement sources. In doing so, we derive necessary conditions on the photon-number statistics of the sources in order to beat the repeaterless bound. We show, for instance, that parametric down-conversion sources do not satisfy the required conditions and thus cannot be used to outperform this bound. |
| first_indexed | 2024-03-12T16:33:03Z |
| format | Article |
| id | doaj.art-fcbf8ab403b146748fad40c733de571d |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:33:03Z |
| publishDate | 2019-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-fcbf8ab403b146748fad40c733de571d2023-08-08T15:26:19ZengIOP PublishingNew Journal of Physics1367-26302019-01-01211111305210.1088/1367-2630/ab54aaBeating the repeaterless bound with adaptive measurement-device-independent quantum key distributionRóbert Trényi0Koji Azuma1Marcos Curty2Escuela de Ingeniería de Telecomunicación, Dept. of Signal Theory and Communications, University of Vigo , E-36310, Vigo, SpainNTT Basic Research Laboratories, NTT Corporation, 3-1 Morinosato Wakamiya, Atsugi, Kanagawa 243-0198, Japan; NTT Research Center for Theoretical Quantum Physics, NTT Corporation, 3-1 Morinosato-Wakamiya, Atsugi, Kanagawa 243-0198, JapanEscuela de Ingeniería de Telecomunicación, Dept. of Signal Theory and Communications, University of Vigo , E-36310, Vigo, SpainSurpassing the repeaterless bound is a crucial task on the way towards realizing long-distance quantum key distribution. In this paper, we focus on the protocol proposed by Azuma et al (2015 Nat. Commun. 6 10171), which can beat this bound with idealized devices. We investigate the robustness of this protocol against imperfections in realistic setups, particularly the multiple-photon pair components emitted by practical entanglement sources. In doing so, we derive necessary conditions on the photon-number statistics of the sources in order to beat the repeaterless bound. We show, for instance, that parametric down-conversion sources do not satisfy the required conditions and thus cannot be used to outperform this bound.https://doi.org/10.1088/1367-2630/ab54aaquantum key distributionrepeaterless boundquantum communicationsquantum cryptographymeasurement-device-independent |
| spellingShingle | Róbert Trényi Koji Azuma Marcos Curty Beating the repeaterless bound with adaptive measurement-device-independent quantum key distribution New Journal of Physics quantum key distribution repeaterless bound quantum communications quantum cryptography measurement-device-independent |
| title | Beating the repeaterless bound with adaptive measurement-device-independent quantum key distribution |
| title_full | Beating the repeaterless bound with adaptive measurement-device-independent quantum key distribution |
| title_fullStr | Beating the repeaterless bound with adaptive measurement-device-independent quantum key distribution |
| title_full_unstemmed | Beating the repeaterless bound with adaptive measurement-device-independent quantum key distribution |
| title_short | Beating the repeaterless bound with adaptive measurement-device-independent quantum key distribution |
| title_sort | beating the repeaterless bound with adaptive measurement device independent quantum key distribution |
| topic | quantum key distribution repeaterless bound quantum communications quantum cryptography measurement-device-independent |
| url | https://doi.org/10.1088/1367-2630/ab54aa |
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