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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.

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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