High-Efficiency Measurement of an Artificial Atom Embedded in a Parametric Amplifier
High-Efficiency Measurement of an Artificial Atom Embedded in a Parametric Amplifier
A crucial limit to measurement efficiencies of superconducting circuits comes from losses involved when coupling to an external quantum amplifier. Here, we realize a device circumventing this problem by directly embedding an artificial atom, comprised of a transmon qubit, within a flux-pumped Josephson parametric amplifier. This configuration is able to …