Josephson bifurcation readout: beyond the monochromatic approximation
Josephson bifurcation readout: beyond the monochromatic approximation
We analyze properties of bifurcation quantum detectors based on weakly nonlinear superconducting resonance circuits, in particular, with application to quantum readout. The developed quantitative description demonstrates strong influence of higher harmonics on their characteristics. While this effect is relevant for various circuits, including the conventional Josephson bifurcation amplifier and the …