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Quantum key distribution over 100 km of underwater optical fiber assisted by a fast-gated single-photon detector
Nowadays quantum key distribution (QKD) represents the most mature quantum technology, and multiple countries as well as private institutions are building their quantum network. However, QKD devices are still far from representing a product within everyone’s reach. Indeed, limitations in terms of co...
Autores principales: | , , , , , , , , , , , , |
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Lenguaje: | eng |
Publicado: |
2023
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Materias: | |
Acceso en línea: | https://dx.doi.org/10.1103/PhysRevApplied.20.044052 http://cds.cern.ch/record/2852693 |
_version_ | 1780977159349731328 |
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author | Ribezzo, Domenico Zahidy, Mujtaba Lemmi, Gianmarco Petitjean, Antoine De Lazzari, Claudia Vagniluca, Ilaria Conca, Enrico Tosi, Alberto Occhipinti, Tommaso Oxenløwe, Leif K. Xuereb, Andrè Bacco, Davide Zavatta, Alessandro |
author_facet | Ribezzo, Domenico Zahidy, Mujtaba Lemmi, Gianmarco Petitjean, Antoine De Lazzari, Claudia Vagniluca, Ilaria Conca, Enrico Tosi, Alberto Occhipinti, Tommaso Oxenløwe, Leif K. Xuereb, Andrè Bacco, Davide Zavatta, Alessandro |
author_sort | Ribezzo, Domenico |
collection | CERN |
description | Nowadays quantum key distribution (QKD) represents the most mature quantum technology, and multiple countries as well as private institutions are building their quantum network. However, QKD devices are still far from representing a product within everyone’s reach. Indeed, limitations in terms of compatibility with existing telecom infrastructure and limited performances in terms of secret key rate, using noncryogenic detection systems, are still critical. In this work, we implemented a quantum key distribution link between Sicily (Italy) and Malta utilizing two different single-photon avalanche diode (SPAD) detectors. The performances of a standard commercial SPAD have been compared with the results achieved with an alternative prototype of fast-gated system in a package (SIP) SPAD; the SIP detector has shown to be able to accomplish a 14 times higher key rate compared with the commercial device over the channel showing 20 dB of losses. |
id | cern-2852693 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2023 |
record_format | invenio |
spelling | cern-28526932023-10-26T06:54:02Zdoi:10.1103/PhysRevApplied.20.044052http://cds.cern.ch/record/2852693engRibezzo, DomenicoZahidy, MujtabaLemmi, GianmarcoPetitjean, AntoineDe Lazzari, ClaudiaVagniluca, IlariaConca, EnricoTosi, AlbertoOcchipinti, TommasoOxenløwe, Leif K.Xuereb, AndrèBacco, DavideZavatta, AlessandroQuantum key distribution over 100 km of underwater optical fiber assisted by a fast-gated single-photon detectorquant-phGeneral Theoretical PhysicsNowadays quantum key distribution (QKD) represents the most mature quantum technology, and multiple countries as well as private institutions are building their quantum network. However, QKD devices are still far from representing a product within everyone’s reach. Indeed, limitations in terms of compatibility with existing telecom infrastructure and limited performances in terms of secret key rate, using noncryogenic detection systems, are still critical. In this work, we implemented a quantum key distribution link between Sicily (Italy) and Malta utilizing two different single-photon avalanche diode (SPAD) detectors. The performances of a standard commercial SPAD have been compared with the results achieved with an alternative prototype of fast-gated system in a package (SIP) SPAD; the SIP detector has shown to be able to accomplish a 14 times higher key rate compared with the commercial device over the channel showing 20 dB of losses.Nowadays Quantum Key Distribution represents the most mature quantum technology, and multiple countries as well as private institutions are building their quantum network. However, QKD devices are still far from representing a product within everyone's reach. Indeed, limitations in terms of compatibility with existing telecom infrastructure and limited performances in terms of secret key rate, using non-cryogenic detection systems, are still critical. In this work, we implemented a quantum key distribution link between Sicily (Italy) and Malta utilizing two different Single-Photon Avalanche Diode (SPAD) detectors. The performances of a standard commercial SPAD have been compared with the results achieved with a new prototype of fast-gated System in a Package (SiP) SPAD; the SiP detector has shown to be able to accomplish a fourteen times higher key rate compared with the commercial device over the channel showing 20 dB of losses.arXiv:2303.01449oai:cds.cern.ch:28526932023-03-02 |
spellingShingle | quant-ph General Theoretical Physics Ribezzo, Domenico Zahidy, Mujtaba Lemmi, Gianmarco Petitjean, Antoine De Lazzari, Claudia Vagniluca, Ilaria Conca, Enrico Tosi, Alberto Occhipinti, Tommaso Oxenløwe, Leif K. Xuereb, Andrè Bacco, Davide Zavatta, Alessandro Quantum key distribution over 100 km of underwater optical fiber assisted by a fast-gated single-photon detector |
title | Quantum key distribution over 100 km of underwater optical fiber assisted by a fast-gated single-photon detector |
title_full | Quantum key distribution over 100 km of underwater optical fiber assisted by a fast-gated single-photon detector |
title_fullStr | Quantum key distribution over 100 km of underwater optical fiber assisted by a fast-gated single-photon detector |
title_full_unstemmed | Quantum key distribution over 100 km of underwater optical fiber assisted by a fast-gated single-photon detector |
title_short | Quantum key distribution over 100 km of underwater optical fiber assisted by a fast-gated single-photon detector |
title_sort | quantum key distribution over 100 km of underwater optical fiber assisted by a fast-gated single-photon detector |
topic | quant-ph General Theoretical Physics |
url | https://dx.doi.org/10.1103/PhysRevApplied.20.044052 http://cds.cern.ch/record/2852693 |
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