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).

–

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