Bifurcation, mode coupling and noise in a nonlinear multimode superconducting RF resonator
arXiv:1304.3693 · doi:10.1063/1.4818123
Abstract
The addition of nonlinearity to an harmonic resonator provides a route to complex dynamical behaviour of resonant modes, including coupling between them. We present a superconducting device that makes use of the nonlinearity of Josephson junctions to introduce a controlled, tunable, nonlinear inductance to a thin film coplanar waveguide resonator. Considering the device as a potential quantum optical component in the microwave regime, we create a sensitive bifurcation amplifier and then demonstrate spectroscopy of other resonant modes via the intermode coupling. We find that the sensitivity of the device approaches within a factor two quantitative agreement with a quantum model by Dykman, but is limited by a noise that has its source(s) on-chip.
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- Superconducting microwave resonators with non-centrosymmetric nonlinearity
- Linear and nonlinear properties of a compact high-kinetic-inductance WSi multimode resonator
- Direct spectrum analysis using a threshold detector with application to a superconducting circuit