File Download
Links for fulltext
(May Require Subscription)
- Publisher Website: 10.1038/s41534-019-0175-6
- Scopus: eid_2-s2.0-85069900946
- WOS: WOS:000478091000001
Supplementary
- Citations:
- Appears in Collections:
Article: Simple security proof of twin-field type quantum key distribution protocol
Title | Simple security proof of twin-field type quantum key distribution protocol |
---|---|
Authors | |
Issue Date | 2019 |
Citation | npj Quantum Information, 2019, v. 5, n. 1, article no. 64 How to Cite? |
Abstract | © 2019, The Author(s). Twin-field (TF) quantum key distribution (QKD) was conjectured to beat the private capacity of a point-to-point QKD link by using single-photon interference in a central measuring station. This remarkable conjecture has recently triggered an intense research activity to prove its security. Here, we introduce a TF-type QKD protocol which is conceptually simpler than the original proposal. It relies on the pre-selection of a global phase, instead of the post-selection of a global phase, which significantly simplifies its security analysis and is arguably less demanding experimentally. We demonstrate that the secure key rate of our protocol has a square-root improvement over the point-to-point private capacity, as conjectured by the original TF QKD. |
Persistent Identifier | http://hdl.handle.net/10722/285840 |
ISI Accession Number ID |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Curty, Marcos | - |
dc.contributor.author | Azuma, Koji | - |
dc.contributor.author | Lo, Hoi Kwong | - |
dc.date.accessioned | 2020-08-18T04:56:47Z | - |
dc.date.available | 2020-08-18T04:56:47Z | - |
dc.date.issued | 2019 | - |
dc.identifier.citation | npj Quantum Information, 2019, v. 5, n. 1, article no. 64 | - |
dc.identifier.uri | http://hdl.handle.net/10722/285840 | - |
dc.description.abstract | © 2019, The Author(s). Twin-field (TF) quantum key distribution (QKD) was conjectured to beat the private capacity of a point-to-point QKD link by using single-photon interference in a central measuring station. This remarkable conjecture has recently triggered an intense research activity to prove its security. Here, we introduce a TF-type QKD protocol which is conceptually simpler than the original proposal. It relies on the pre-selection of a global phase, instead of the post-selection of a global phase, which significantly simplifies its security analysis and is arguably less demanding experimentally. We demonstrate that the secure key rate of our protocol has a square-root improvement over the point-to-point private capacity, as conjectured by the original TF QKD. | - |
dc.language | eng | - |
dc.relation.ispartof | npj Quantum Information | - |
dc.rights | This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. | - |
dc.title | Simple security proof of twin-field type quantum key distribution protocol | - |
dc.type | Article | - |
dc.description.nature | published_or_final_version | - |
dc.identifier.doi | 10.1038/s41534-019-0175-6 | - |
dc.identifier.scopus | eid_2-s2.0-85069900946 | - |
dc.identifier.volume | 5 | - |
dc.identifier.issue | 1 | - |
dc.identifier.spage | article no. 64 | - |
dc.identifier.epage | article no. 64 | - |
dc.identifier.eissn | 2056-6387 | - |
dc.identifier.isi | WOS:000478091000001 | - |
dc.identifier.issnl | 2056-6387 | - |