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).

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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