Strong measurement and quantum feedback for persistent Rabi oscillations in circuit QED experiments

Abstract : We investigate the stabilization of the dynamical state of a superconducting qubit. In a series of papers, A. Korotkov and his co-workers suggested that continuous weak measurement of the state of a qubit and applying an appropriate feedback on the amplitude of a Rabi drive, should maintain the coherence of the Rabi oscillations for arbitrary time. Here, in the aim of addressing a metrological application of these persistent Rabi oscillations, we explore a new variant of such strategies. This variant is based on performing strong measurements in a discrete manner and using the measurement record to correct the phase of the Rabi oscillations. Noting that such persistent Rabi oscillations can be viewed as an amplitude-to-frequency convertor (converting the amplitude of the Rabi microwave drive to a precise frequency), we propose another feedback layer consisting of a simple analog phase locked loop to compensate the low frequency deviations in the amplitude of the Rabi drive.
Type de document :
Communication dans un congrès
CDC 2012 - Proceedings of the 51th IEEE Conference on Decision and Control, Dec 2012, Maui, United States. pp.3646 - 3651, 2012, 〈10.1109/CDC.2012.6426309〉
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https://hal.inria.fr/hal-00845271
Contributeur : Mazyar Mirrahimi <>
Soumis le : mardi 16 juillet 2013 - 17:01:13
Dernière modification le : vendredi 16 novembre 2018 - 02:15:15

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Mazyar Mirrahimi, B. Huard, Michel Devoret. Strong measurement and quantum feedback for persistent Rabi oscillations in circuit QED experiments. CDC 2012 - Proceedings of the 51th IEEE Conference on Decision and Control, Dec 2012, Maui, United States. pp.3646 - 3651, 2012, 〈10.1109/CDC.2012.6426309〉. 〈hal-00845271〉

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