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dc.contributor.authorSaiphet, Jirawat
dc.contributor.authorSuwanna, Sujin
dc.contributor.authorCarvalho, Andre RR
dc.contributor.authorChantasri, Areeya
dc.date.accessioned2021-05-31T01:02:36Z
dc.date.available2021-05-31T01:02:36Z
dc.date.issued2021
dc.identifier.issn2469-9926en_US
dc.identifier.doi10.1103/PhysRevA.103.022208en_US
dc.identifier.urihttp://hdl.handle.net/10072/404761
dc.description.abstractThe no-knowledge quantum feedback was proposed by Szigeti et al. [Phys. Rev. Lett. 113, 020407 (2014)] as a measurement-based feedback protocol for decoherence suppression for an open quantum system. By continuously measuring environmental noises and feeding back controls on the system, the protocol can completely reverse the measurement back-action and therefore suppress the system's decoherence. However, the complete decoherence cancellation was shown only for the instantaneous feedback, which is impractical in real experiments. Therefore, in this work, we generalize the original work and investigate how the decoherence suppression can be degraded with unavoidable delay times, by analyzing non-Markovian average dynamics. We present analytical expressions for the average dynamics and numerically analyze the effects of the delayed feedback for a coherently driven two-level system, coupled to a bosonic bath via a Hermitian coupling operator. We also find that, when the qubit's unitary dynamics does not commute with the measurement and feedback controls, the decoherence rate can be either suppressed or amplified, depending on the delay time.en_US
dc.description.peerreviewedYesen_US
dc.languageEnglishen_US
dc.publisherAmerican Physical Societyen_US
dc.relation.ispartofpagefrom022208en_US
dc.relation.ispartofissue2en_US
dc.relation.ispartofjournalPhysical Review Aen_US
dc.relation.ispartofvolume103en_US
dc.subject.fieldofresearchEnvironmental Sciencesen_US
dc.subject.fieldofresearchPhysical Sciencesen_US
dc.subject.fieldofresearchcode05en_US
dc.subject.fieldofresearchcode02en_US
dc.subject.keywordsScience & Technologyen_US
dc.subject.keywordsOpticsen_US
dc.subject.keywordsPhysics, Atomic, Molecular & Chemicalen_US
dc.titleTime-delayed quantum feedback and incomplete decoherence suppression with a no-knowledge measurementen_US
dc.typeJournal articleen_US
dc.type.descriptionC1 - Articlesen_US
dcterms.bibliographicCitationSaiphet, J; Suwanna, S; Carvalho, ARR; Chantasri, A, Time-delayed quantum feedback and incomplete decoherence suppression with a no-knowledge measurement, Physical Review A, 2021, 103 (2), pp. 022208en_US
dc.date.updated2021-05-28T03:53:22Z
dc.description.versionAccepted Manuscript (AM)en_US
gro.rights.copyright© 2021 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.en_US
gro.hasfulltextFull Text
gro.griffith.authorChantasri, Areeya


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