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- Title
Multilevel Effects in a Driven Generalized Rabi Model.
- Authors
Pietikäinen, I.; Danilin, S.; Kumar, K. S.; Tuorila, J.; Paraoanu, G. S.
- Abstract
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.
- Subjects
RESONANCE frequency analysis; SUPERCONDUCTING circuits; MICROWAVES; QUBITS; FLOQUET'S theorem
- Publication
Journal of Low Temperature Physics, 2018, Vol 191, Issue 5/6, p354
- ISSN
0022-2291
- Publication type
Article
- DOI
10.1007/s10909-018-1857-8