Coherent, Landau-Zener control of a superconducting composite qubit

ORAL

Abstract

We consider a computational subspace defined by two transmons coupled with a fixed capacitance. Following Ref. 1, we identify the resonantly coupled, hybridized states as a composite qubit (CQB). The CQB architecture has the desirable property that universal single-CQB gates may be implemented using solely coherent, Landau-Zener control methods based on fast, broadband pulses, without need for microwave control signals. The fidelity of these single-CQB gates is comparable to current state-of-the-art implementations2. We present these experimental demonstrations and discuss the susceptibility of the CQB to various noise channels.
1Shim, Y.-P. and Tahan, C. Nat. Commun. 7 11059 (2016).
2Barends R, et al. Nature 508 500 (2014).

*This research was funded in part by an IC Postdoctoral Fellowship; a National Defense Science and Engineering Graduate Fellowship, and by the Departmentof Defense via MIT Lincoln Laboratory under Air Force Contract No. FA8721-05-C-0002. The views and conclusions contained herein are those of the authors and should not be interpreted as necessarily representing the official policies or endorsements, either expressed or implied, of the U.S. Government.

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Presenters

  • Daniel Campbell

    • Research Laboratory of Electronics, Massachusetts Institute of Technology
    • Research Laboratory of Electronics, Massachusetts Institute of Technology, USA
    • Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139
    • Massachusetts Institute of Technology

Authors

  • Daniel Campbell

    • Research Laboratory of Electronics, Massachusetts Institute of Technology
    • Research Laboratory of Electronics, Massachusetts Institute of Technology, USA
    • Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139
    • Massachusetts Institute of Technology

  • Bharath Kannan

    • Massachusetts Institute of Technology
    • Electrical Engineering and Computer Science, Massachusetts Institute of Technology
    • Research Laboratory of Electronics, Dept. of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, USA
    • Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139
    • Research Laboratory of Electronics, Massachusetts Institute of Technology

  • Yun-Pil Shim

    • Laboratory for Physical Sciences
    • Laboratory for Physical Sciences, Department of Physics, University of Maryland, College Park, MD 20740

  • Roni Winik

    • Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139
    • Research Laboratory of Electronics, Massachusetts Institute of Technology

  • Alexander Melville

    • MIT Lincoln Lab
    • MIT Lincoln Laboratory
    • Massachusetts Institute of Technology
    • Lincoln Laboratory, Massachusetts Institute of Technology
    • MIT Lincoln Laboratory, 244 Wood Street, Lexington, MA 02421
    • MIT Lincoln Laboratory, Massachusetts Institute of Technology

  • Bethany M. Niedzielski

    • Massachusetts Institute of Technology
    • MIT Lincoln Laboratory
    • MIT Lincoln Laboratory, 244 Wood Street, Lexington, MA 02421

  • Jonilyn L Yoder

    • MIT Lincoln Lab
    • Lincoln Laboratory, Massachusetts Institute of Technology
    • MIT Lincoln Laboratory
    • Massachusetts Institute of Technology
    • Massachusetts Institute of Technology Lincoln Laboratory
    • Lincoln Lab, Massachusetts Institute of Technology, USA
    • MIT Lincoln Laboratory, 244 Wood Street, Lexington, MA 02421
    • MIT Lincoln Laboratory, Massachusetts Institute of Technology

  • Charles Tahan

    • Laboratory for Physical Sciences, College Park, MD 20740, U.S.A.
    • Laboratory for Physical Sciences, College Park, MD 20740

  • Terry Philip Orlando

    • Massachusetts Institute of Technology
    • Electrical Engineering and Computer Science, Research Laboratory of Electronics, Massachusetts Institute of Technology
    • Research Laboratory of Electronics, Electrical Engineering and Computer Science, Massachusetts Institute of Technology
    • Research Laboratory of Electronics, Massachusetts Institute of Technology
    • Research Laboratory of Electronics, Dept. of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, USA
    • Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139

  • Simon Gustavsson

    • Research Laboratory of Electronics, Massachusetts Institute of Technology
    • Massachusetts Institute of Technology
    • Research Laboratory of Electronics, Massachusetts Institute of Technology, USA
    • Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139
    • Research Laboratory of Electronics, MIT

  • William D Oliver

    • Research Laboratory of Electronics, Massachusetts Institute of Technology
    • Department of Physics, Research Laboratory of Electronics, Lincoln Laboratory, Massachusetts Institute of Technology
    • MIT Lincoln Lab
    • MIT Lincoln Laboratory, Department of Physics, Massachusetts Institute of Technology
    • MIT Lincoln Laboratory
    • Massachusetts Institute of Technology
    • Research Laboratory of Electronics, Physics, Lincoln Laboratory, Massachusetts Institute of Technology
    • Department of Physics, Massachusetts Institute of Technology
    • Research Laboratory of Electronics, Massachusetts Institute of Technology, MIT Lincoln Laboratory, Physics, Massachusetts Institute of Technology
    • Dept. of Physics, Research Laboratory of Electronics, and Lincoln Lab, Massachusetts Institute of Technology, USA
    • Research Laboratory of Electronics, Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, MIT Lincoln Laboratory, 244 Wood Street, Lexington, MA
    • Massachusetts Institute of Technology and MIT Lincoln Laboratory
    • Research Laboratory of Electronics, MIT Lincoln Laboratory, Department of Physics, Massachusetts Institute of Technology
    • Department of Physics, Research Laboratory of Electronics, MIT Lincoln Laboratory, Massachusetts Institute of Technology
    • Department of Physics, MIT; Research Laboratory of Electronics, MIT; MIT Lincoln Laboratory