Slow noise processes in superconducting resonators
Slow noise processes in superconducting resonators
Slow noise processes, with characteristic timescales $\ensuremath{\sim}$1 s, have been studied in planar superconducting resonators. A frequency-locked loop is employed to track deviations of the resonator center frequency with high precision and bandwidth. Comparative measurements are made in varying microwave drive and temperature, and between bare resonators and those with …