The DOI matches its Crossref record; 30 of the 30 references it cites were found in a registry or an index.
Sending-or-Not-Sending with Independent Lasers: Secure Twin-Field Quantum Key Distribution over 509 km
Open accessAbstract
Twin-field (TF) quantum key distribution (QKD) promises high key rates over long distances to beat the rate-distance limit. Here, applying the sending-or-not-sending TF QKD protocol, we experimentally demonstrate a secure key distribution that breaks the absolute key-rate limit of repeaterless QKD over a 509-km-long ultralow loss optical fiber. Two independent lasers are used as sources with remote-frequency-locking technique over the 500-km fiber distance. Practical optical fibers are used as the optical path with appropriate noise filtering; and finite-key effects are considered in the key-rate analysis. The secure key rate obtained at 509 km is more than seven times higher than the relative bound of repeaterless QKD for the same detection loss. The achieved secure key rate is also higher than that of a traditional QKD protocol running with a perfect repeaterless QKD device, even for an infinite number of sent pulses. Our result shows that the protocol and technologies applied in this experiment enable TF QKD to achieve a high secure key rate over a long distribution distance, and is therefore practically useful for field implementation of intercity QKD.
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Cites
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Self-citationQuantum Key Distribution with High Loss: Toward Global Secure Communication
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Self-citationFundamental limits of repeaterless quantum communications
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Overcoming the rate–distance limit of quantum key distribution without quantum repeaters
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Self-citationLow Earth Orbit Satellite Security and Reliability: Issues, Solutions, and the Road Ahead
Yue, P., An, J., Zhang, J., Ye, J., Pan, G., Wang, S., Xiao, P., & Hanzo, L. (2023) · IEEE Communications Surveys & Tutorials · doi:10.1109/comst.2023.3296160 · Cited by 291
Metadata
- Authors
- Chen, J.-P., Zhang, C., Liu, Y., Jiang, C., Zhang, W., Hu, X.-L., Guan, J.-Y., Yu, Z.-W., Xu, H., Lin, J., Li, M.-J., Chen, H., Li, H., You, L., Wang, Z., Wang, X.-B., Zhang, Q., & Pan, J.-W.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2020-02-20
- Volume
- 124
- Issue
- 7
- Pages
- 070501-070501
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W2981311533
- Cited by
- 380
- References
- 30
- FWCI
- 25.10
- Type
- journal article
- Language
- en
- Open access
- green
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- Chen, J.-P., Zhang, C., Liu, Y., Jiang, C., Zhang, W., Hu, X.-L., Guan, J.-Y., Yu, Z.-W., Xu, H., Lin, J., Li, M.-J., Chen, H., Li, H., You, L., Wang, Z., Wang, X.-B., Zhang, Q., & Pan, J.-W. (2020). Sending-or-Not-Sending with Independent Lasers: Secure Twin-Field Quantum Key Distribution over 509 km. Physical Review Letters. https://doi.org/10.1103/physrevlett.124.070501
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