Direct spectrum analysis using a threshold detector with application to a superconducting circuit
Direct spectrum analysis using a threshold detector with application to a superconducting circuit
We introduce a new and quantitative theoretical framework for noise spectral analysis using a threshold detector, which is then applied to a superconducting device: the Josephson bifurcation amplifier. We show that this new framework provides direct access to the environmental noise spectrum with a sensitivity approaching the standard quantum limit …