High coherence quantum simulation of coherent backscattering in an effective two-level system composed of two superconducting qubits

ORAL

Abstract

In a recent experiment by Gustavsson et al. [1], a superconducting flux qubit was used to model scattering events using multiple Landau-Zener transitions by driving the qubit periodically back and forth through an avoided crossing. In highly coherent systems, time-reversal symmetry in the driving field should give rise to a dip in the average transition rate (averaged over many quantum trajectories), by analogy with weak localization in condensed matter systems. We experimentally emulate the scattering events with multiple Landau-Zener transitions in an effective two-level system, seeking to demonstrate the theoretically predicted weak localization phenomenon in this system, Ferrón et al. [2]. The effects of system-bath coupling are accurately simulated by a Floquet-Markov master equation.

[1] Phys. Rev. Lett. 110, 016603 (2013)
[2] Phys. Rev. B 95, 045412 (2017)

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Presenters

  • Ana Gramajo

    Research Laboratory of Electronics, Massachusetts Institute of Technology, Bariloche Atomic Center

Authors

  • Ana Gramajo

    Research Laboratory of Electronics, Massachusetts Institute of Technology, Bariloche Atomic Center

  • Dan Campbell

    Research Laboratory of Electronics, 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

  • David K Kim

    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, 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

    Michigan State University, MIT Lincoln Laboratory, Lincoln Laboratory, Massachusetts Institute of Technology, MIT Lincoln Lab, Department of Physics, Massachusetts Institute of Technology, MIT Lincoln Laboratory, Massachusetts Institute of Technology

  • 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

  • Daniel Domínguez

    Balseiro Institute, Bariloche Atomic Centre

  • María José Sánchez

    Balseiro Institute, Bariloche Atomic Centre

  • 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