Full control of Josephson nonlinear processes in a Gradiometric SNAIL Parametric Amplifier

ORAL

Abstract

Superconducting parametric amplifiers rely on nonlinear processes in order to coherently amplify readout photons with the addition of a minimal amount of noise limited just by Quantum Mechanics principles. A precise tuning of these processes is required to achieve 20dB gain at the readout tone frequency and, simultaneously, obtain a Kerr-free operation in order to reduce undesired effects as gain compression. State-of-the-art parametric amplifiers are capable of Kerr-free operation at a single frequency only, depending on the design parameters of the device. In this work, we present experimental results on the Gradiometric SNAIL Parametric Amplifier (GSPA), a device biased by two independent on-chip magnetic fluxes that allow to independently tune even and odd Josephson nonlinearities. Such a device is capable of 20dB Kerr-free amplification over a continuous range of frequency, providing a shortcut towards the development of a precision and universal parametric amplifier for optimal readout of many-qubit platforms.

*Work supported by ARO

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Presenters

  • Alessandro Miano

    • Dept. of Physics "E. Pancini", Federico II University of Naples

Authors

  • Alessandro Miano

    • Dept. of Physics "E. Pancini", Federico II University of Naples

  • Gangqiang Liu

    • Yale University
    • Applied Physics Department, Yale University

  • Volodymyr Sivak

    • Applied Physics Department, Yale University
    • Yale University
    • Department of Applied Physics and Physics, Yale University

  • Luigi Frunzio

    • Applied Physics Department, Yale University
    • Yale University
    • Applied Physics, Yale University
    • Department of Applied Physics and Physics, Yale University

  • Vidul Joshi

    • Applied Physics Department, Yale University
    • Yale University

  • Wei Dai

    • Applied Physics Department, Yale University
    • Yale University

  • Nicholas Frattini

    • Yale University
    • Applied Physics Department, Yale University
    • Department of Applied Physics and Physics, Yale University
    • Departments of Applied Physics and Physics, Yale University

  • Michel Devoret

    • Yale University
    • Applied Physics Department, Yale University
    • Yale
    • Department of Applied Physics and Physics, Yale University
    • Applied Physics, Yale University
    • Departments of Applied Physics and Physics, Yale University