Nonlinearities and Parametric Amplification in Superconducting Coplanar Waveguide Resonators

Abstract

Experimental investigations of the nonlinear properties of superconducting niobium coplanar waveguide resonators are reported. The nonlinearity due to a current dependent kinetic inductance of the center conductor is strong enough to realize bifurcation of the nonlinear oscillator. When driven with two frequencies near the threshold for bifurcation, parametric amplification with a gain of +22.4 dB is observed.

4 pages, 5 figures, 1 table. In version 2: Added appendix with model description and fits to measurements. Minor corrections and rephrasing

References in corpus (1)

• Intermodulation Gain in Nonlinear NbN Superconducting Microwave Resonators

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