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Improved mirror position estimation using resonant quantum smoothing

Wheatley, Trevor A; Tsang, Mankei; Petersen, Ian R; Huntington, Elanor Harriet

Description

Quantum parameter estimation, the ability to precisely obtain a classical value in a quantum system, is very important to many key quantum technologies. Many of these technologies rely on an optical probe, either coherent or squeezed states to make a precise measurement of a parameter ultimately limited by quantum mechanics. We use this technique to theoretically model, simulate and validate by experiment the measurement and precise estimation of the position of a cavity mirror. In non-resonant...[Show more]

dc.contributor.authorWheatley, Trevor A
dc.contributor.authorTsang, Mankei
dc.contributor.authorPetersen, Ian R
dc.contributor.authorHuntington, Elanor Harriet
dc.date.accessioned2015-09-03T03:59:00Z
dc.date.available2015-09-03T03:59:00Z
dc.identifier.issn2196-0763
dc.identifier.urihttp://hdl.handle.net/1885/15141
dc.description.abstractQuantum parameter estimation, the ability to precisely obtain a classical value in a quantum system, is very important to many key quantum technologies. Many of these technologies rely on an optical probe, either coherent or squeezed states to make a precise measurement of a parameter ultimately limited by quantum mechanics. We use this technique to theoretically model, simulate and validate by experiment the measurement and precise estimation of the position of a cavity mirror. In non-resonant systems, the achieved estimation enhancement from quantum smoothing over optimal filtering has not exceeded a factor two, even when squeezed state probes were used. Using a coherent state probe, we show that using quantum smoothing on a mechanically resonant structure driven by a resonant forcing function can result significantly greater improvement in parameter estimation than with non-resonant systems. In this work, we show that it is possible to achieve a smoothing improvement by a factor in excess of three times over optimal filtering. By using intra-cavity light as the probe we obtain finer precision than has been achieved with the equivalent quantum resources in free-space.
dc.description.sponsorshipThis work was supported financially by the Australian Research Council, Grant No. CE110001029, DP1094650, FL110100020 and DP109465. MT acknowledges support from the Singapore National Research Foundation under NRF Grant No. NRF-NRFF2011-07.
dc.publisherSpringer Open
dc.rights© 2015 Wheatley et al.; licensee Springer. Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
dc.sourceEPJ Quantum Technology
dc.subjectquantum smoothing
dc.subjectquantum parameter estimation
dc.subjectcavity mirror position
dc.titleImproved mirror position estimation using resonant quantum smoothing
dc.typeJournal article
local.identifier.citationvolume2
dc.date.issued2015
local.identifier.absfor090602 - Control Systems, Robotics and Automation
local.identifier.absfor020604 - Quantum Optics
local.identifier.absfor010203 - Calculus of Variations, Systems Theory and Control Theory
local.identifier.ariespublicationu3700390xPUB191
local.type.statusPublished Version
local.contributor.affiliationHuntington, Elanor H, Research School of Engineering, College of Engineering and Computer Science, The Australian National University
dc.relationhttp://purl.org/au-research/grants/arc/CE110001029
dc.relationhttp://purl.org/au-research/grants/arc/DP1094650
dc.relationhttp://purl.org/au-research/grants/arc/FL110100020
dc.relationhttp://purl.org/au-research/grants/arc/DP109465
local.bibliographicCitation.issue1
local.bibliographicCitation.startpage1
local.bibliographicCitation.lastpage13
local.identifier.doi10.1140/epjqt/s40507-015-0026-0
dc.date.updated2018-11-29T08:16:51Z
local.identifier.thomsonID000421393300013
CollectionsANU Research Publications

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