Superconducting circuit with charge-parity protection: Experiment

ORAL

Abstract

High-fidelity measurement and control of protected superconducting qubits constitutes a serious challenge for Hamiltonian quantum error correction. Such protected qubits benefit from their immunity to environmental fluctuations, but suffer from difficulties in implementing readout and manipulation. We propose two strategies for overcoming these difficulties: cascaded dispersive readout and indirect transitions. In our experiment, the realization of these strategies relies on the introduction of an ancillary mode containing a Superconducting Nonlinear Asymmetric Inductive eLement (SNAIL). The principles underlying these readout and control schemes as well as experimental evidence for their efficacy will be presented.

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Presenters

  • Clarke Smith

    Applied Physics, Yale University

Authors

  • Clarke Smith

    Applied Physics, Yale University

  • Angela Kou

    Applied Physics, Yale University, Yale Univ

  • Xu Xiao

    Applied Physics, Yale University

  • Ioannis Tsioutsios

    Applied Physics, Yale University

  • Uri Vool

    Physics, Harvard University, Applied Physics, Yale University, Yale Univ

  • Jayameenakshi Venkatraman

    Applied Physics, Yale University, Department of Applied Physics, Yale Univ

  • Kyle Serniak

    Applied Physics, Yale University

  • Shyam Shankar

    Applied Physics, Yale University, Department of Applied Physics, Yale University, Department of Applied Physics, Yale Univ, Yale Univ

  • Michel Devoret

    Yale University, Applied Physics, Yale University, Department of Applied Physics, Yale University, Applied Physics, Yale Univ, Physics and Applied Physics, Yale University, Yale Univ, Dept. of Applied Physics, Yale University, Department of Applied Physics, Yale Univ