Parity measurement using parametrically driven resonators - part 2

ORAL

Abstract

Non-destructive measurement of multi-qubit parity stabilizers is essential in quantum error correction. For superconducting qubits, one way to perform such parity measurements is to use an ancilla qubit and multiple two-qubit gates. However, this increases the required number of qubits for a given code and the need for two-qubit gates makes this measurement slow.
We propose to directly measure the parity of multiple qubits through a single parametrically driven nonlinear resonator. This would reduce the experimental footprint and at the same time make the parity measurements faster. In this talk, we will present numerical simulations showing that this measurement is fast, high-fidelity and that it preserves the measurement eigenspaces.

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Presenters

  • Baptiste Royer

    • Institut quantique and Départment de Physique, Université de Sherbrooke
    • Institut Quantique and Département de Physique, Université de Sherbooke
    • University of Sherbrooke
    • Institut quantique and Département de Physique, Université de Sherbrooke
    • Institut Quantique and Département de Physique, Université de Sherbrooke
    • Department of Physics, University of Sherbrooke

Authors

  • Baptiste Royer

    • Institut quantique and Départment de Physique, Université de Sherbrooke
    • Institut Quantique and Département de Physique, Université de Sherbooke
    • University of Sherbrooke
    • Institut quantique and Département de Physique, Université de Sherbrooke
    • Institut Quantique and Département de Physique, Université de Sherbrooke
    • Department of Physics, University of Sherbrooke

  • Shruti Puri

    • Yale University
    • Yale Quantum Institute, Yale University

  • Steven Girvin

    • Yale University
    • Applied Physics, Yale University
    • Department of Physics, Yale University
    • Yale Quantum Institute, Yale University

  • Alexandre Blais

    • Institut quantique and Departement de Physique, Universite de Sherbrooke
    • Physique, Institut Quantique
    • University of Sherbrooke
    • Institut quantique and Department de Physique, Universite de Sherbrooke
    • Physique, Universite de Sherbrooke
    • Physics, University of Sherbrooke
    • Institut quantique and Départment de Physique, Université de Sherbrooke
    • Institut Quantique and Département de Physique, Université de Sherbrooke
    • Univ of Sherbrooke
    • Institut Quantique and Département de Physique, Université de Sherbooke
    • Institut quantique and Département de Physique, Université de Sherbrooke
    • Department of Physics, University of Sherbrooke