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Communication dans un congrès
Design of strict control-Lyapunov functions for Quantum systems with QND measurements
Abstract : We consider discrete-time quantum systems subject to Quantum Non-Demolition (QND) measurements and controlled by an adjustable unitary evolution between two successive QND measures. In open-loop, such QND measurements provide a non-deterministic preparation tool exploiting the back-action of the measurement on the quantum state. We propose here a systematic method based on elementary graph theory and inversion of Laplacian matrices to construct strict control-Lyapunov functions. This yields an appropriate feedback law that stabilizes globally the system towards a chosen target state among the open-loop stable ones, and that makes in closed-loop this preparation deterministic. We illustrate such feedback laws through simulations corresponding to an experimental setup with QND photon counting.
https://hal-mines-paristech.archives-ouvertes.fr/hal-00683461
Contributeur : François Chaplais <>
Soumis le : mercredi 28 mars 2012 - 17:46:32
Dernière modification le : jeudi 24 septembre 2020 - 17:04:18
Archivage à long terme le : : vendredi 29 juin 2012 - 02:27:52
Contributeur : François Chaplais <>
Soumis le : mercredi 28 mars 2012 - 17:46:32
Dernière modification le : jeudi 24 septembre 2020 - 17:04:18
Archivage à long terme le : : vendredi 29 juin 2012 - 02:27:52
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LyapunovQuantumSystems.pdf
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