Multi-Transmon circuit QED using local and fast flux biasing

ORAL

Abstract

We report local and fast flux tuning of Transmon qubits in circuit QED by means of proximal short-circuited coplanar waveguides. We characterize the effect of these additional microwave channels on qubit lifetime. We demonstrate one-qubit $Z$-gates and time-domain control of two-qubit interaction via virtual photon exchange. Gate performance is characterized by process tomography and compared to gating by AC Stark shift as previously investigated by the Yale cQED team [1]. Research supported by NSF, NSA and ARO. [1] Majer \textit{et al.,} \textit{Nature} \textbf{449}, 443 (2007).

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Authors

  • Leonardo DiCarlo

    • Yale University

  • Jerry Chow

    • Yale University

  • Johannes Majer

    • Vienna University of Technology

  • Luigi Frunzio

    • Yale University
    • Dept. of Applied Physics, Yale University

  • Jay Gambetta

    • University of Waterloo
    • Institute for quantum computing
    • IQC and University of Waterloo

  • Alexandre Blais

    • Universite de Sherbrooke
    • University of Sherbrooke

  • Steven Girvin

    • Yale University
    • Yale Applied Physics

  • Robert Schoelkopf

    • Yale University
    • Departments of Applied Physics and Physics, Yale University
    • Yale Applied Physics