Effects of qubit frequency crowding on scalable quantum processors

ORAL

Abstract

Lattices of transmon qubits offer a scalable architecture to build quantum processors. Long qubit coherence times and hardware-efficient cross-resonance gates enable low gate error rates. However, frequency-crowding among the qubits can increase gate errors. Neighboring qubits must have similar but non-degenerate excitation energies. In this talk we will quantify the effects of frequency crowding and consider how this behavior scales with device size for 50-qubit and larger systems. We will also discuss strategies to mitigate or eliminate frequency crowding during device fabrication.

*We acknowledge support from IARPA under Contract No. W911NF-16-0114

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Presenters

  • Jared Hertzberg

    • IBM TJ Watson Research Center
    • IBM Thomas J. Watson Research Center

Authors

  • Jared Hertzberg

    • IBM TJ Watson Research Center
    • IBM Thomas J. Watson Research Center

  • Sami Rosenblatt

    • IBM TJ Watson Research Center

  • Jose M Chavez

    • IBM TJ Watson Research Center

  • Easwar M Magesan

    • IBM TJ Watson Research Center

  • John A Smolin

    • IBM TJ Watson Research Center

  • Jeng-Bang Yau

    • IBM TJ Watson Research Center

  • Vivekananda Adiga

    • IBM TJ Watson Research Center

  • Markus Brink

    • IBM TJ Watson Research Center

  • Eric J Zhang

    • IBM TJ Watson Research Center

  • Jason Orcutt

    • IBM TJ Watson Research Center

  • Jerry M. Chow

    • IBM TJ Watson Research Center
    • IBM Thomas J. Watson Research Center