Zhang, Yi-Chen, Chen, Ziyang, Pirandola, Stefano orcid.org/0000-0001-6165-5615 et al. (7 more authors) (2020) Long-distance continuous-variable quantum key distribution over 202.81 km fiber. Physical Review Letters. 010502. ISSN 1079-7114
Abstract
Quantum key distribution (QKD) provides secure keys resistant to code-breaking quantum computers. The continuous-variable version of QKD offers the advantages of higher secret key rates in metropolitan areas, as well as the use of standard telecom components that can operate at room temperature. However, the transmission distance of these systems (compared with discrete-variable systems) are currently limited and considered unsuitable for long-distance distribution. Herein, we report the experimental results of long distance continuous-variable QKD over 202.81 km of ultralow-loss optical fiber by suitably controlling the excess noise and employing highly-efficient reconciliation procedures. This record-breaking implementation of the continuous-variable QKD doubles the previous distance record and shows the road for long-distance and large-scale secure QKD using room-temperature standard telecom components.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details. |
Keywords: | quant-ph |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Computer Science (York) |
Depositing User: | Pure (York) |
Date Deposited: | 16 Jun 2020 14:40 |
Last Modified: | 08 Feb 2025 00:38 |
Published Version: | https://doi.org/10.1103/PhysRevLett.125.010502 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1103/PhysRevLett.125.010502 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:161908 |
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Description: 1. Long-distance continuous-variable quantum key distribution over 202.81 km fiber