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Design and Fabrication of Impedance Matched Parametric Amplifiers for Quantum Applications

ORAL

Abstract

Josephson parametric amplifiers (JPAs) are an important resource for the single-shot readout of superconducting qubits. Being able to amplify signals at the quantum limit, with noise approaching 1/2-photon for phase-independent gain [1], enables high fidelity measurements of single as well as multiplexed qubits. We will describe the circuit designs and fabrication process for on-chip impedance matched lumped-element JPAs ([2], [3]) operated in both three-wave and four-wave mixing modes. We will present data on the devices’ gain, saturation power, and bandwidth. Key improvements from the previous year’s design will be discussed as well as practical advice for ensuring reliable performance in the cryogenic environment.

[1] R. Vijay, et al, Phys. Rev. Lett., 106, 110502, 2011
[2] J. Y. Mutus, et al, Appl. Phys. Lett. 103, 122602, 2013
[3] T. Roy, et al, Appl. Phys. Lett. 107, 262601, 2015

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Presenters

  • Joel Grebel

    University of Chicago, Pritzker School of Molecular Engineering, University of Chicago

Authors

  • Joel Grebel

    University of Chicago, Pritzker School of Molecular Engineering, University of Chicago

  • Audrey Bienfait

    University of Chicago, Pritzker School of Molecular Engineering, University of Chicago

  • Hung-Shen Chang

    University of Chicago, Pritzker School of Molecular Engineering, University of Chicago

  • Ming-Han Chou

    University of Chicago, Pritzker School of Molecular Engineering, University of Chicago

  • Christopher R Conner

    University of Chicago, Pritzker School of Molecular Engineering, University of Chicago

  • Etienne Dumur

    Argonne National Laboratory; University of Chicago, Neel Institute, University Grenoble Alpes, CNRS, Argonne National Laboratory, University of Chicago; Argonne National Laboratory, Institute for Molecular Engineering, University of Chicago, Chicago IL 60637,USA

  • Gregory Peairs

    University of California, Santa Barbara; University of Chicago, Department of Physics, University of California, Santa Barbara

  • Rhys G Povey

    University of Chicago, Pritzker School of Molecular Engineering, University of Chicago

  • Youpeng Zhong

    University of Chicago, Pritzker School of Molecular Engineering, University of Chicago

  • Andrew Cleland

    University of Chicago, Argonne National Laboratory; University of Chicago, Pritzker School of Molecular Engineering, University of Chicago, Argonne National Laboratory, University of Chicago; Argonne National Laboratory