Multilevel effects in a driven generalized Rabi model

Pietikäinen, I., Danilin, S. , Kumar, K.S., Tuorila, J. and Paraoanu, G.S. (2018) Multilevel effects in a driven generalized Rabi model. Journal of Low Temperature Physics, 191(5-6), pp. 354-364. (doi: 10.1007/s10909-018-1857-8)

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We study numerically the onset of higher-level excitations and resonance frequency shifts in the generalized multilevel Rabi model with dispersive coupling under strong driving. The response to a weak probe is calculated using the Floquet method, which allows us to calculate the probe spectrum and extract the resonance frequency. We test our predictions using a superconducting circuit consisting of a transmon coupled capacitively to a coplanar waveguide resonator. This system is monitored by a weak probe field and at the same time driven at various powers by a stronger microwave tone. We show that the transition from the quantum to the classical regime is accompanied by a rapid increase of the transmon occupation and consequently that the qubit approximation is valid only in the extreme quantum limit.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Danilin, Dr Sergey
Authors: Pietikäinen, I., Danilin, S., Kumar, K.S., Tuorila, J., and Paraoanu, G.S.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Journal of Low Temperature Physics
ISSN (Online):1573-7357
Published Online:30 January 2018

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