Limitations and improvements of two qubit gates in superconducting circuit QED

ORAL

Abstract

Remarkable progress has been made towards creating and operating processors for quantum computation and simulation with superconducting circuits, with respect to qubit count and coherence time. This has allowed for the implementation of a variety of quantum algorithms on small quantum processors, with promising results thus far. However, significant limitations on the fidelity of multi-qubit entangling gates remain, placing constraints on the scalability of current processors with respect to algorithmic circuit depth. We explore the sources of errors in these gates, include designs with employ cross-resonance and parametric interactions, and attempt to correct and/or mitigate the errors with hardware improvements, control sophistication, and algorithmic error suppression.

*This work was supported by the Army Research Office.

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Presenters

  • Ravi Naik

    • Physics, Univ of California – Berkeley
    • University of Chicago

Authors

  • Ravi Naik

    • Physics, Univ of California – Berkeley
    • University of Chicago

  • Bradley Mitchell

    • Univ of California - Berkeley
    • Physics, Univ of California – Berkeley
    • University of California, Berkeley

  • Unpil Baek

    • Physics, University of California, Berkeley
    • Physics, Univ of California – Berkeley
    • University of California, Berkeley

  • Dar Dahlen

    • Physics, Univ of California – Berkeley
    • University of California, Berkeley

  • John Mark Kreikebaum

    • Physics, Univ of California – Berkeley
    • University of California, Berkeley

  • Vinay Ramasesh

    • Physics, Univ of California – Berkeley
    • University of California, Berkeley

  • Machiel Blok

    • Physics, Univ of California – Berkeley
    • Univ of California - Berkeley
    • University of California, Berkeley

  • Irfan Siddiqi

    • University of California, Berkeley
    • Physics, University of California, Berkeley
    • Univ of California – Berkeley
    • Univ of California - Berkeley
    • Physics, Univ of California – Berkeley