Parity measurements using parametrically driven resonators: Part I

ORAL

Abstract

Multi-qubit parity measurements are indispensable for quantum error correction. A possible way to realize these is by homodyne measurement of the field of a cavity which is dispersively coupled to multiple qubits. However such an interaction can lead to dephasing within the parity subspace and results in only half-parity measurement. With the aim of overcoming this shortcoming, in this talk we will introduce the parametrically driven nonlinear resonator as an alternate approach to measure multi-qubit parity. With analytical results, we will show that this approach leads to significant reduction of parity-subspace dephasing making full-parity measurements possible.

*NSF DMR-1609326
ARO W911NF1410011

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Presenters

  • Shruti Puri

    • Department of Physics, Yale University

Authors

  • Shruti Puri

    • Department of Physics, Yale University

  • 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

  • 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