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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.issn2469-9926
dc.identifier.doi10.1103/PhysRevA.103.022208
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.
dc.description.peerreviewedYes
dc.languageEnglish
dc.publisherAmerican Physical Society
dc.relation.ispartofpagefrom022208
dc.relation.ispartofissue2
dc.relation.ispartofjournalPhysical Review A
dc.relation.ispartofvolume103
dc.subject.fieldofresearchPhysical sciences
dc.subject.fieldofresearchEnvironmental sciences
dc.subject.fieldofresearchcode51
dc.subject.fieldofresearchcode41
dc.subject.keywordsScience & Technology
dc.subject.keywordsOptics
dc.subject.keywordsPhysics, Atomic, Molecular & Chemical
dc.titleTime-delayed quantum feedback and incomplete decoherence suppression with a no-knowledge measurement
dc.typeJournal article
dc.type.descriptionC1 - Articles
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. 022208
dc.date.updated2021-05-28T03:53:22Z
dc.description.versionAccepted Manuscript (AM)
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.
gro.hasfulltextFull Text
gro.griffith.authorChantasri, Areeya


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