Characterization of a multimode coplanar waveguide parametric amplifier

Understand

We characterize a novel Josephson parametric amplifier based on a flux-tunable quarter-wavelength resonator.

• The fundamental resonance frequency is ~1GHz, but we use higher modes of the resonator for our measurements.
• An on-chip tuning line allows for magnetic flux pumping of the amplifier.
• We investigate and compare degenerate parametric amplification, involving a single mode, and nondegenerate parametric amplification, using a pair of modes.