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dc.contributor.authorCortez, Luis
dc.contributor.authorChantasri, Areeya
dc.contributor.authorGarcía-Pintos, Luis Pedro
dc.contributor.authorDressel, Justin
dc.contributor.authorJordan, Andrew N.
dc.date.accessioned2017-10-09T03:19:18Z
dc.date.available2017-10-09T03:19:18Z
dc.date.issued2017
dc.identifier.issn2469-9926
dc.identifier.doi10.1103/PhysRevA.95.012314
dc.identifier.urihttp://hdl.handle.net/10072/347933
dc.description.abstractWe investigate the determination of a Hamiltonian parameter in a quantum system undergoing continuous measurement. We demonstrate a computationally rapid method to estimate an unknown and possibly time-dependent parameter, where we maximize the likelihood of the observed stochastic readout. By dealing directly with the raw measurement record rather than the quantum-state trajectories, the estimation can be performed while the data are being acquired, permitting continuous tracking of the parameter during slow drifts in real time. Furthermore, we incorporate realistic nonidealities, such as decoherence processes and measurement inefficiency. As an example, we focus on estimating the value of the Rabi frequency of a continuously measured qubit and compare maximum likelihood estimation to a simpler fast Fourier transform. Using this example, we discuss how the quality of the estimation depends on both the strength and the duration of the measurement; we also discuss the trade-off between the accuracy of the estimate and the sensitivity to drift as the estimation duration is varied.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherAmerican Physical Society
dc.relation.ispartofpagefrom012314-1
dc.relation.ispartofpageto012314-11
dc.relation.ispartofissue1
dc.relation.ispartofjournalPhysical Review A
dc.relation.ispartofvolume95
dc.subject.fieldofresearchQuantum Information, Computation and Communication
dc.subject.fieldofresearchcode020603
dc.titleRapid estimation of drifting parameters in continuously measured quantum systems
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
dc.description.versionAccepted Manuscript (AM)
gro.rights.copyright© 2017 American Physical Society. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.
gro.hasfulltextFull Text
gro.griffith.authorChantasri, Areeya


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