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- Publisher Website: 10.1103/PhysRevA.95.012333
- Scopus: eid_2-s2.0-85011545455
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Article: Improved key-rate bounds for practical decoy-state quantum-key-distribution systems
Title | Improved key-rate bounds for practical decoy-state quantum-key-distribution systems |
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Authors | |
Issue Date | 2017 |
Citation | Physical Review A, 2017, v. 95, n. 1, article no. 012333 How to Cite? |
Abstract | The decoy-state scheme is the most widely implemented quantum-key-distribution protocol in practice. In order to account for the finite-size key effects on the achievable secret key generation rate, a rigorous statistical fluctuation analysis is required. Originally, a heuristic Gaussian-approximation technique was used for this purpose, which, despite its analytical convenience, was not sufficiently rigorous. The fluctuation analysis has recently been made rigorous by using the Chernoff bound. There is a considerable gap, however, between the key-rate bounds obtained from these techniques and that obtained from the Gaussian assumption. Here we develop a tighter bound for the decoy-state method, which yields a smaller failure probability. This improvement results in a higher key rate and increases the maximum distance over which secure key exchange is possible. By optimizing the system parameters, our simulation results show that our method almost closes the gap between the two previously proposed techniques and achieves a performance similar to that of conventional Gaussian approximations. |
Persistent Identifier | http://hdl.handle.net/10722/315270 |
ISSN | 2023 Impact Factor: 2.6 2023 SCImago Journal Rankings: 1.081 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Zhang, Zhen | - |
dc.contributor.author | Zhao, Qi | - |
dc.contributor.author | Razavi, Mohsen | - |
dc.contributor.author | Ma, Xiongfeng | - |
dc.date.accessioned | 2022-08-05T10:18:16Z | - |
dc.date.available | 2022-08-05T10:18:16Z | - |
dc.date.issued | 2017 | - |
dc.identifier.citation | Physical Review A, 2017, v. 95, n. 1, article no. 012333 | - |
dc.identifier.issn | 2469-9926 | - |
dc.identifier.uri | http://hdl.handle.net/10722/315270 | - |
dc.description.abstract | The decoy-state scheme is the most widely implemented quantum-key-distribution protocol in practice. In order to account for the finite-size key effects on the achievable secret key generation rate, a rigorous statistical fluctuation analysis is required. Originally, a heuristic Gaussian-approximation technique was used for this purpose, which, despite its analytical convenience, was not sufficiently rigorous. The fluctuation analysis has recently been made rigorous by using the Chernoff bound. There is a considerable gap, however, between the key-rate bounds obtained from these techniques and that obtained from the Gaussian assumption. Here we develop a tighter bound for the decoy-state method, which yields a smaller failure probability. This improvement results in a higher key rate and increases the maximum distance over which secure key exchange is possible. By optimizing the system parameters, our simulation results show that our method almost closes the gap between the two previously proposed techniques and achieves a performance similar to that of conventional Gaussian approximations. | - |
dc.language | eng | - |
dc.relation.ispartof | Physical Review A | - |
dc.title | Improved key-rate bounds for practical decoy-state quantum-key-distribution systems | - |
dc.type | Article | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1103/PhysRevA.95.012333 | - |
dc.identifier.scopus | eid_2-s2.0-85011545455 | - |
dc.identifier.volume | 95 | - |
dc.identifier.issue | 1 | - |
dc.identifier.spage | article no. 012333 | - |
dc.identifier.epage | article no. 012333 | - |
dc.identifier.eissn | 2469-9934 | - |
dc.identifier.isi | WOS:000396130200006 | - |