Cat-qubit operations preserving error structure

ORAL

Abstract

A universal quantum computer will require error correction to perform in a fault-tolerant way, imposing substantial engineering challenges. Fortunately, many devices are subject to errors with structure that can be exploited to ease the burden of fault tolerance. Stabilized cat qubits in superconducting circuits push this principle to the extreme, with recent work identifying dramatic reduction of fault-tolerance requirements on this platform. Essential to this reduction is the ability to perform operations on the qubits that preserve the error structure, made possible by the infinite-dimensional Hilbert space in which the cats live. We present additional operations fulfilling this requirement and discuss their potential for near- and long-term applications.

*This work was undertaken thanks in part to funding from NSERC and the Canada First Research Excellence Fund. Shruti Puri also acknowledges support from ARO W911NF-18-1-0212 and NSF DMR-1609326.

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Presenters

  • Jonathan Gross

    • Institut Quantique, Universite de Sherbrooke
    • Institut quantique and Département de Physique, Universite de Sherbrooke

Authors

  • Jonathan Gross

    • Institut Quantique, Universite de Sherbrooke
    • Institut quantique and Département de Physique, Universite de Sherbrooke

  • Shruti Puri

    • Yale Quantum Institute, Yale University
    • Yale University

  • Alexandre Blais

    • Universite de Sherbrooke
    • Institut quantique and Departement de Physique, Universite de Sherbrooke
    • Institut Quantique, Universite de Sherbrooke
    • Département de Physique, Université de Sherbrooke
    • Institut quantique & Département de Physique, Université de Sherbrooke
    • Institut Quantique and Departement de Physique, Universite de Sherbrooke, Sherbrooke, Canada
    • Institut quantique and Département de Physique, Universite de Sherbrooke