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Article: Proof-of-Principle Experimental Demonstration of Twin-Field Type Quantum Key Distribution

TitleProof-of-Principle Experimental Demonstration of Twin-Field Type Quantum Key Distribution
Authors
Issue Date2019
Citation
Physical Review Letters, 2019, v. 123, n. 10, article no. 100506 How to Cite?
Abstract© 2019 American Physical Society. The twin-field (TF) quantum key distribution (QKD) protocol and its variants are highly attractive because they can beat the well-known fundamental limit of the secret key rate for point-to-point QKD without quantum repeaters (repeaterless bound). In this Letter, we perform a proof-of-principle experimental demonstration of TFQKD based on the protocol proposed by Curty, Azuma, and Lo, which removes the need for postselection on the matching of a global phase from the original TFQKD scheme and can deliver a high secret key rate. Furthermore, we employ a Sagnac loop structure to help overcome the major difficulty in the practical implementation of TFQKD, namely, the need to stabilize the phase of the quantum state over kilometers of fiber. As a proof-of-principle demonstration, the estimated secure key rate from our experimental TFQKD data at the high loss region surpasses the repeaterless bound of QKD with current technology.
Persistent Identifierhttp://hdl.handle.net/10722/285842
ISSN
2020 Impact Factor: 9.161
2020 SCImago Journal Rankings: 3.688
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorZhong, Xiaoqing-
dc.contributor.authorHu, Jianyong-
dc.contributor.authorCurty, Marcos-
dc.contributor.authorQian, Li-
dc.contributor.authorLo, Hoi Kwong-
dc.date.accessioned2020-08-18T04:56:47Z-
dc.date.available2020-08-18T04:56:47Z-
dc.date.issued2019-
dc.identifier.citationPhysical Review Letters, 2019, v. 123, n. 10, article no. 100506-
dc.identifier.issn0031-9007-
dc.identifier.urihttp://hdl.handle.net/10722/285842-
dc.description.abstract© 2019 American Physical Society. The twin-field (TF) quantum key distribution (QKD) protocol and its variants are highly attractive because they can beat the well-known fundamental limit of the secret key rate for point-to-point QKD without quantum repeaters (repeaterless bound). In this Letter, we perform a proof-of-principle experimental demonstration of TFQKD based on the protocol proposed by Curty, Azuma, and Lo, which removes the need for postselection on the matching of a global phase from the original TFQKD scheme and can deliver a high secret key rate. Furthermore, we employ a Sagnac loop structure to help overcome the major difficulty in the practical implementation of TFQKD, namely, the need to stabilize the phase of the quantum state over kilometers of fiber. As a proof-of-principle demonstration, the estimated secure key rate from our experimental TFQKD data at the high loss region surpasses the repeaterless bound of QKD with current technology.-
dc.languageeng-
dc.relation.ispartofPhysical Review Letters-
dc.titleProof-of-Principle Experimental Demonstration of Twin-Field Type Quantum Key Distribution-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1103/PhysRevLett.123.100506-
dc.identifier.pmid31573297-
dc.identifier.scopuseid_2-s2.0-85072654137-
dc.identifier.volume123-
dc.identifier.issue10-
dc.identifier.spagearticle no. 100506-
dc.identifier.epagearticle no. 100506-
dc.identifier.eissn1079-7114-
dc.identifier.isiWOS:000483944300003-
dc.identifier.issnl0031-9007-

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