Tunable and Switchable Coupling Between Two Superconducting Resonators

Understand

We realize a device allowing for tunable and switchable coupling between two 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 frequency and time domain 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 saturating the qubit.