Statut | Confirmé |
Série | LPENS-MDQ |
Domaines | cond-mat |
Date | Jeudi 20 Octobre 2016 |
Heure | 11:00 |
Institut | LPA |
Salle | L363/L365 24 rue Lhomond |
Nom de l'orateur | Flurin |
Prenom de l'orateur | Emmanuel |
Addresse email de l'orateur | emmanuel [dot] flurin [at] gmail [dot] com |
Institution de l'orateur | Department of Physics, University of California, Berkeley |
Titre | Dynamics of Simultaneously Measured Non-Commuting Observables |
Résumé | In quantum mechanics, measurement restores a classical notion of reality via collapse of the wavefunction, which yields a precisely defined outcome. On the other hand, the Heisenberg uncertainty principle dictates that incompatible observables, such as position and momentum, cannot both take on arbitrarily precise values. But how does a wavefunction evolve when two such quantities are probed simultaneously, and how does the uncertainty principle dynamically inhibit precise measurement outcomes? In this talk I will present a novel detection scheme that allows control over the measurement operators of multiple readout channels of a superconducting qubit. I will show how the uncertainty principle governs the dynamics of the state by enforcing a lower bound on the measurement-induced disturbance, inhibiting wavefunction collapse and consequently leading to persistent diffusion. I will also discuss the ramifications of this scheme in the context of quantum control and metrology applications. |
Numéro de preprint arXiv | |
Commentaires | |
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