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Tunable and switchable coupling between two superconducting resonators
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DOI：10.1103/PhysRevB.91.014515.png)
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Abstract
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We realize a device allowing for tunable and switchable coupling between two frequency-degenerate superconducting resonators mediated by an artificial atom. For the latter, we utilize a persistent current flux qubit. We characterize the tunable and switchable coupling in the frequency and time domains and find that the coupling between the relevant modes can be varied in a controlled way. Specifically, the coupling can be tuned by adjusting the flux through the qubit loop or by controlling the qubit population via a microwave drive. Our measurements allow us to find parameter regimes for optimal coupler performance and quantify the tunability range.
Keywords:
CIRCUIT QUANTUM ELECTRODYNAMICS
QUBITS
CAVITY
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