Role of syndrome information on a one-way quantum repeater using teleportation-based error correction

TitleRole of syndrome information on a one-way quantum repeater using teleportation-based error correction
Publication TypeJournal Article
Year of Publication2016
AuthorsR Namiki, L Jiang, J Kim, and N Lütkenhaus
JournalPhysical Review A
Volume94
Issue5
Date Published01/2016
Abstract

© 2016 American Physical Society. We investigate a quantum repeater scheme for quantum key distribution based on the work by S. Muralidharan [Phys. Rev. Lett. 112, 250501 (2014)]PRLTAO0031-900710.1103/PhysRevLett.112.250501. Our scheme extends that work by making use of error syndrome measurement outcomes available at the repeater stations. We show how to calculate the secret key rates for the case of optimizing the syndrome information, while the known key rate is based on a scenario of coarse graining the syndrome information. We show that these key rates can surpass the Pirandola-Laurenza-Ottaviani-Banchi bound on secret key rates of direct transmission over lossy bosonic channels.

DOI10.1103/PhysRevA.94.052304
Short TitlePhysical Review A