Quantum repeaters based on concatenated bosonic and discrete-variable quantum codes
AffiliationJames C. Wyant College of Optical Sciences, University of Arizona
MetadataShow full item record
CitationRozpędek, F., Noh, K., Xu, Q., Guha, S., & Jiang, L. (2021). Quantum repeaters based on concatenated bosonic and discrete-variable quantum codes. Npj Quantum Information, 7(1).
Journalnpj Quantum Information
RightsCopyright © The Author(s) 2021. This article is licensed under a Creative Commons Attribution 4.0 International License.
Collection InformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at firstname.lastname@example.org.
AbstractWe propose an architecture of quantum-error-correction-based quantum repeaters that combines techniques used in discrete- and continuous-variable quantum information. Specifically, we propose to encode the transmitted qubits in a concatenated code consisting of two levels. On the first level we use a continuous-variable GKP code encoding the qubit in a single bosonic mode. On the second level we use a small discrete-variable code. Such an architecture has two important features. Firstly, errors on each of the two levels are corrected in repeaters of two different types. This enables for achieving performance needed in practical scenarios with a reduced cost with respect to an architecture for which all repeaters are the same. Secondly, the use of continuous-variable GKP code on the lower level generates additional analog information which enhances the error-correcting capabilities of the second-level code such that long-distance communication becomes possible with encodings consisting of only four or seven optical modes. © 2021, The Author(s).
NoteOpen access journal
VersionFinal published version
Except where otherwise noted, this item's license is described as Copyright © The Author(s) 2021. This article is licensed under a Creative Commons Attribution 4.0 International License.