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Show simple item record Du Toit, PJW Burd, SC Konrad, T Uys, Hermann 2019-02-13T07:54:58Z 2019-02-13T07:54:58Z 2018-12
dc.identifier.citation Du Toit, P.J.W. et al. 2018. Real-time state estimation and feedback control of an oscillating qubit via self-fulfilling prophecy (SFP). Metrologia, vol. 56(1): en_US
dc.identifier.issn 1681-7575
dc.identifier.issn 0026-1394
dc.description Copyright: IOP Publishing. Due to copyright restrictions, the attached PDF file only contains the abstract of the full text item. For access to the full text item, please consult the publisher's website. The definitive version of the work is published at en_US
dc.description.abstract We present protocols for feedback control and stabilization of a single qubit undergoing Rabi oscillations. Using a hybrid quantum-classical Bayesian estimation technique we simulate monitoring of the dynamical parameter (Rabi frequency) of the governing Hamiltonian in real-time. We numerically demonstrate feedback control of the system parameter using a classical proportional-integral feedback control scheme and show that by implementing a unitary reversal of the back-action of the weak measurement the loop response time is dramatically reduced. This reversal is chosen by assuming the system is already executing the targeted dynamics, an approach called self-fulfilling prophecy. In addition, self-fulfilling prophecy reduces measurement induced noise, leading to stabilized dynamics. en_US
dc.language.iso en en_US
dc.publisher IOP Publishing en_US
dc.relation.ispartofseries Worklist;22016
dc.subject Self-fulfilling prophecy en_US
dc.subject SFP en_US
dc.subject Rabi oscillations en_US
dc.subject Rabi frequency en_US
dc.title Real-time state estimation and feedback control of an oscillating qubit via self-fulfilling prophecy (SFP) en_US
dc.type Article en_US

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