Design and Fabrication of Broadband Parametric Amplifiers for Quantum Applications

ORAL

Abstract

Josephson parametric amplifiers (JPAs) provide a straightforward means for the quantum-limited amplification of signals, with noise approaching 1/2-photon for phase-independent gain [1]. These are an important resource for the single-shot readout of superconducting qubits, allowing high fidelity measurements of single as well as multiplexed qubits. I will describe the circuit designs and fabrication process for JPAs developed at the University of Chicago, fabricated in a new nanofabrication facility. The process includes low-loss dielectric deposition, superconducting crossovers, and a Dolan-bridge based Josephson junction definition. We will present data on lumped-element JPA devices with state-of-the-art gain, saturation power, and bandwidth [2], and describe different circuit designs for achieving large bandwidths [3].

[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

*Supported by AFOSR MURI FA9550-15-1-0029, UChicago MRSEC (NSF DMR-1420709), DOE, UChicago PNF SHyNE NNCI NSF EECS-1542205, ARL W911NF-15-2-0058, and ANL.

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Presenters

  • Joel Grebel

    • University of Chicago
    • Institute for Molecular Engineering, University of Chicago

Authors

  • Joel Grebel

    • University of Chicago
    • Institute for Molecular Engineering, University of Chicago

  • Audrey Bienfait

    • University of Chicago
    • Institute for Molecular Engineering, University of Chicago

  • Etienne Dumur

    • University of Chicago
    • Institute for Molecular Engineering, University of Chicago

  • Hung-Shen Chang

    • University of Chicago
    • Institute for Molecular Engineering, University of Chicago

  • Ming-Han Chou

    • University of Chicago
    • Institute for Molecular Engineering, University of Chicago

  • Christopher Conner

    • University of Chicago
    • Institute for Molecular Engineering, University of Chicago

  • Gregory A Peairs

    • University of Chicago
    • Physics, University of California, Santa Barbara
    • University of California, Santa Barbara
    • Department of Physics, University of California, Santa Barbara
    • Department of Physics, Univerity of California, Santa Barbara
    • UC Santa Barbara; University of Chicago

  • Rhys G Povey

    • University of Chicago
    • Institute for Molecular Engineering, University of Chicago

  • Kevin Satzinger

    • Physics, University of California, Santa Barbara
    • University of California, Santa Barbara
    • Department of Physics, University of California, Santa Barbara
    • Department of Physics, Univerity of California, Santa Barbara
    • UC Santa Barbara; University of Chicago
    • Google Inc - Santa Barbara

  • Youpeng Zhong

    • University of Chicago
    • Institute for Molecular Engineering, University of Chicago

  • Andrew N Cleland

    • University of Chicago
    • Institute for Molecular Engineering, University of Chicago