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Characterization of a measurement-based noiseless linear amplifier and its applications

Zhao, Jie; Haw, Jing-Yan; Symul, Thomas; Lam, Ping; Assad, Syed

Description

A noiseless linear amplifier (NLA) adds no noise to the signals it processes, which works only in a probabilistic way. It can be realized approximately with either a physical implementation that truncates the working space of the NLA on a photon-number basis or a measurement-based implementation that realizes the truncation virtually by a bounded postselection filter. To examine the relationship between these two approximate NLAs, we characterize in detail the measurement-based NLA and compare...[Show more]

dc.contributor.authorZhao, Jie
dc.contributor.authorHaw, Jing-Yan
dc.contributor.authorSymul, Thomas
dc.contributor.authorLam, Ping
dc.contributor.authorAssad, Syed
dc.date.accessioned2020-12-20T20:51:51Z
dc.date.available2020-12-20T20:51:51Z
dc.identifier.issn1094-1622
dc.identifier.urihttp://hdl.handle.net/1885/217903
dc.description.abstractA noiseless linear amplifier (NLA) adds no noise to the signals it processes, which works only in a probabilistic way. It can be realized approximately with either a physical implementation that truncates the working space of the NLA on a photon-number basis or a measurement-based implementation that realizes the truncation virtually by a bounded postselection filter. To examine the relationship between these two approximate NLAs, we characterize in detail the measurement-based NLA and compare it with its physical counterpart in terms of their abilities to preserve the state Gaussianity and their probability of success. The link between these amplifiers is further clarified by integrating them into a measure-and-prepare setup. We stress the equivalence between the physical and the measurement-based approaches holds only when the effective parameters, the amplification gain, the cutoff, and the amplitude of the input state, are taken into account. Finally, we construct a 1-to-infinity cloner using the two amplifiers and show that a fidelity surpassing the no-cloning limit is achievable with the measurement-based NLA.
dc.format.mimetypeapplication/pdf
dc.language.isoen_AU
dc.publisherAmerican Physical Society
dc.sourcePhysical Review A - Atomic, Molecular, and Optical Physics
dc.titleCharacterization of a measurement-based noiseless linear amplifier and its applications
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume96
dc.date.issued2017
local.identifier.absfor020603 - Quantum Information, Computation and Communication
local.identifier.ariespublicationU9212960xPUB179
local.type.statusPublished Version
local.contributor.affiliationZhao, Jie, College of Science, ANU
local.contributor.affiliationHaw, Jing-Yan, College of Science, ANU
local.contributor.affiliationSymul, Thomas, College of Science, ANU
local.contributor.affiliationLam, Ping, College of Science, ANU
local.contributor.affiliationAssad, Syed, College of Science, ANU
local.bibliographicCitation.issue1
local.bibliographicCitation.startpage012319, 1
local.bibliographicCitation.lastpage12
local.identifier.doi10.1103/PhysRevA.96.012319
local.identifier.absseo970102 - Expanding Knowledge in the Physical Sciences
dc.date.updated2020-11-23T10:18:24Z
local.identifier.scopusID2-s2.0-85026815939
local.identifier.thomsonID000405362900006
CollectionsANU Research Publications

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