Multiphoton dressing of an anharmonic superconducting many-level quantum circuit

Braumüller, J. et al. (2015) Multiphoton dressing of an anharmonic superconducting many-level quantum circuit. Physical Review B, 91(5), 054523. (doi:10.1103/PhysRevB.91.054523)

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Abstract

We report on the investigation of a superconducting anharmonic multilevel circuit that is coupled to a harmonic readout resonator. We observe multiphoton transitions via virtual energy levels of our system up to the fifth excited state. The back-action of these higher-order excitations on our readout device is analyzed quantitatively and demonstrated to be in accordance with theoretical expectation. By applying a strong microwave drive we achieve multiphoton dressing within our anharmonic circuit which is dynamically coupled by a weak probe tone. The emerging higher-order Rabi sidebands and associated Autler-Townes splittings involving up to five levels of the investigated anharmonic circuit are observed. Experimental results are in good agreement with master-equation simulations.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Weides, Professor Martin
Authors: Braumüller, J., Cramer, J., Schlör, S., Rotzinger, H., Radtke, L., Lukashenko, A., Yang, P., Skacel, S. T., Probst, S., Marthaler, M., Guo, L., Ustinov, A. V., and Weides, M.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Physical Review B
Publisher:American Physical Society
ISSN:1098-0121
ISSN (Online):2469-9969
Copyright Holders:Copyright © 2015 American Physical Society
First Published:First published in Physical Review B 91(5): 054523
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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