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Estimation of output channel noise for continuous variable quantum key distribution

Thearle, Oliver; Assad, Syed M.; Symul, Thomas

Description

Estimation of channel parameters is important for extending the range and increasing the key rate of continuous variable quantum key distribution protocols. We propose a new estimator for the channel noise parameter based on the method of moments. The method of moments finds an estimator from the moments of the output distribution of the protocol. This estimator has the advantage of being able to use all of the states shared between Alice and Bob. Other estimators are limited to a smaller...[Show more]

dc.contributor.authorThearle, Oliver
dc.contributor.authorAssad, Syed M.
dc.contributor.authorSymul, Thomas
dc.date.accessioned2016-10-07T01:42:14Z
dc.date.available2016-10-07T01:42:14Z
dc.identifier.issn2469-9926
dc.identifier.urihttp://hdl.handle.net/1885/109177
dc.description.abstractEstimation of channel parameters is important for extending the range and increasing the key rate of continuous variable quantum key distribution protocols. We propose a new estimator for the channel noise parameter based on the method of moments. The method of moments finds an estimator from the moments of the output distribution of the protocol. This estimator has the advantage of being able to use all of the states shared between Alice and Bob. Other estimators are limited to a smaller publicly revealed subset of the states. The proposed estimator has a lower variance for high loss channel than what has previously been proposed. We show that the method of moments estimator increases the key rate by up to an order of magnitude at the maximum transmission of the protocol.
dc.format6 pages
dc.publisherAmerican Physical Society
dc.rights© 2016 American Physical Society. http://www.sherpa.ac.uk/romeo/issn/2469-9926/..."Publisher's version/PDF may be used on author's personal website or employer's website only" from SHERPA/RoMEO site (as at 7/10/16).
dc.sourcePhysical Review A
dc.titleEstimation of output channel noise for continuous variable quantum key distribution
dc.typeJournal article
local.identifier.citationvolume93
dc.date.issued2015-08-20
local.identifier.ariespublicationU9212960xPUB170
local.publisher.urlhttp://www.aps.org/
local.type.statusPublished Version
local.contributor.affiliationThearle, O., Centre for Quantum Computation and Communication Technology, Department of Quantum Science, Research School of Physics and Engineering, The Australian National University
local.contributor.affiliationAssad, S. M., Centre for Quantum Computation and Communication Technology, Department of Quantum Science, Research School of Physics and Engineering, The Australian National University
local.contributor.affiliationSymul, T., Centre for Quantum Computation and Communication Technology, Department of Quantum Science, Research School of Physics and Engineering, The Australian National University
local.bibliographicCitation.issue4
local.bibliographicCitation.startpage042343
local.identifier.doi10.1103/PhysRevA.93.042343
local.identifier.absseo970102 - Expanding Knowledge in the Physical Sciences
local.identifier.scopusID2-s2.0-84964790252
local.identifier.thomsonID000374929600004
dcterms.accessRightsOpen Access
CollectionsANU Research Publications

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