Anomalous Charge Noise in Superconducting Qubits

ORAL

Abstract

We describe experiments to probe fluctuations in offset charge in weakly charge-sensitive superconducting qubits that depart from the transmon regime. We explore a range of device geometries to elucidate the surprising scale dependence of charge noise in these qubits, and we describe experiments to investigate possible spatial correlation in charge fluctuations in neighboring devices. Since quantum error correction schemes such as the two-dimensional surface code rely on the assumption of uncorrelated noise, these studies could have implications for scale-up towards fault-tolerant superconducting qubit arrays.

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Presenters

  • Chris Wilen

    • University of Wisconsin - Madison

Authors

  • Chris Wilen

    • University of Wisconsin - Madison

  • Bradley Christensen

    • University of Wisconsin - Madison

  • Alexander M Opremcak

    • University of Wisconsin - Madison

  • Ameya Riswadkar

    • University of Wisconsin - Madison

  • Lara Faoro

    • University of Wisconsin - Madison
    • Physics, University of Wiconsin - Madison

  • Lev B Ioffe

    • Google.; University of Wisconsin - Madison
    • University of Wisconsin - Madison
    • Physics, University of Wiconsin - Madison
    • University of Wisconsin

  • Robert F McDermott

    • University of Wisconsin - Madison
    • Department of Physics, University of Wisconsin-Madison, Madison WI, USA
    • Physics, University of Wiconsin - Madison