Physical-Size Biasing Corrections for Improved Josephson Junction Targeting

ORAL

Abstract

In order to bring superconducting qubit technology to scale it is important to improve the consistency and targetability of Josephson junction critical currents. The critical current of junctions can be predicted via measurements of their room temperature resistance. For qubit designability, the fabrication goal is for the critical current to be uniform across junctions of all sizes. We find that this expected critical current does not scale linearly with junction area, which needs to be compensated for in order to achieve accurate cryogenic parameter targeting. This work will investigate the use of physical-size biasing as a method for improving critical current targeting across a range of junction sizes and a range of critical current densities in an effort to improve cryogenic parameter predictability.

*This research was supported under Air Force Contract No. FA8702-15-D-0001. The views and conclusions contained herein are those of the authors and should not be interpreted as necessarily representing the official policies or endorsements, either expressed or implied, of the U.S. Government or the U.S. Air Force.

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Presenters

  • Hannah M Stickler

    • MIT Lincoln Laboratory

Authors

  • Hannah M Stickler

    • MIT Lincoln Laboratory

  • Bethany M Niedzielski

    • MIT Lincoln Laboratory
    • Lincoln Laboratory, Massachusetts Institute of Technology

  • Michael Gingras

    • MIT Lincoln Laboratory

  • Jeffrey M Knecht

    • MIT Lincoln Laboratory

  • Kevin Grossklaus

    • MIT Lincoln Laboratories
    • MIT Lincoln Laboratory

  • Kate Azar

    • Massachusetts Institute of Technology
    • MIT
    • MIT Lincoln Laboratory

  • Renée DePencier Piñero

    • MIT Lincoln Laboratory
    • Lincoln Laboratory, MIT

  • Greg Calusine

    • MIT Lincoln Laboratory

  • Ali Sabbah

    • MIT Lincoln Laboratory

  • Felipe Contipelli

    • MIT Lincoln Laboratory

  • Duncan Miller

    • MIT Lincoln Laboratory

  • Arthur Kurlej

    • MIT Lincoln Laboratory

  • Jonilyn L Yoder

    • MIT Lincoln Laboratory
    • Lincoln Laboratory, Massachusetts Institute of Technology

  • Mollie E Schwartz

    • MIT Lincoln Laboratory
    • Lincoln Laboratory, Massachusetts Institute of Technology

  • William D Oliver

    • Massachusetts Institute of Technology
    • Massachusetts Institute of Technology (MIT)

  • Kyle Serniak

    • MIT Lincoln Laboratory
    • Lincoln Laboratory, Massachusetts Institute of Technology