On-chip integration of superconducting qubits with a multilayer fabrication platform for filters and Josephson amplifiers

ORAL

Abstract

As superconducting quantum computers continue to scale in size and complexity, it becomes increasingly desirable to co-fabricate as much of the peripheral circuitry directly on the qubit chip. In addition to reducing size and complexity of the packaging, this direct integration of filtering, isolation, and amplification circuits would enable enhanced performance. However, it is crucial to ensure that this added functionality does not compromise qubit coherence. Here we report on our progress to develop a low-loss and compact fabrication platform that integrates Al transmon qubits with on-chip Purcell and bias filters, and resonant Josephson parametric amplifiers based on our existing Nb-trilayer process. The platform has a prospect of producing complete quantum processor chips in a single fabrication run and is compatible with alpha-Ta, a superconductor shown to exhibit low surface losses in SC circuits.

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Presenters

  • Katarina Cicak

    • National Institute of Standards and Technology Boulder
    • National Institute of Standards and Technology
    • National Institute of Standards and Technology (NIST)

Authors

  • Katarina Cicak

    • National Institute of Standards and Technology Boulder
    • National Institute of Standards and Technology
    • National Institute of Standards and Technology (NIST)

  • Kristen L Genter

    • University of Colorado Boulder, National Institute of Standards and Technology
    • University of Colorado, Boulder
    • University of Colorado Boulder, National Institute of Standards and Technology Boulder

  • Kaixuan Ji

    • University of Colorado Boulder, National Institute of Standards and Technology
    • University of Colorado Boulder, National Institute of Standards and Technology Boulder

  • Tony McFadden

    • National Institute of Standards and Technology Boulder
    • National Institute of Standards and Technology
    • National Institute of Standards and Technology, Boulder CO 80305
    • National Institute of Standards and Technology, Boulder, Colorado 80305, USA
    • National Institute of Standards and Technology (NIST)
    • University of California, Santa Barbara
    • National Institute of Standards and Technology, Boulder

  • Trevyn F.Q. F Larson

    • National Institute of Standards and Technology Boulder
    • National Institute of Standards and Technology
    • University of Colorado
    • University of Colorado Boulder, National Institute of Standards and Technology
    • University of Colorado Boulder, National Institute of Standards and Technology Boulder

  • Zachary Parrott

    • University of Colorado Boulder, National Institute of Standards and Technology
    • National Institute of Standards and Technology, Boulder, Colorado 80305, USA
    • University of Colorado, Boulder
    • University of Colorado Boulder
    • University of Colorado Boulder, National Institute of Standards and Technology Boulder
    • NIST, Boulder

  • Akash V Dixit

    • National Institute of Standards and Technology Boulder
    • National Institute of Standards and Technology

  • Florent Lecocq

    • National Institute of Standards and Technology, University of Colorado Boulder
    • National Institute of Standards and Technology
    • National Institute of Standards and Technology Boulder
    • National Institute of Standards and Technology, Boulder, Colorado 80305, USA
    • National Institute of Standards and Technology Boulder, University of Colorado Boulder

  • John D Teufel

    • National Institute of Standards and Technology, University of Colorado Boulder
    • National Institute of Standards and Technology Boulder

  • Jose A Aumentado

    • National Institute of Standards and Technology, University of Colorado Boulder
    • National Institute of Standards and Technology Boulder

  • Ray W Simmonds

    • National Institute of Standards and Technology, University of Colorado Boulder
    • National Institute of Standards and Technology
    • National Institute of Standards and Technology Boulder
    • The Global Coherence Project