Toward exploring multichannel charge Kondo effects for investigating quantum criticality

ORAL

Abstract

Recent proposals[1,2] have demonstrated a non-Fermi liquid fixed point in superconducting and topological superconducting islands, analogous to the charge Kondo effect in normal metallic islands. The topological Kondo effect is predicted to be robust against channel detuning and to have a heightened crossover temperature when tuned to charge degeneracy, making this an especially attractive regime for investigating quantum criticality and for demonstrating nonlocal quantum phenomena through Majorana modes. I will talk about our efforts in experimentally realizing new multichannel charge Kondo devices on InAs 2DEG platforms.

[1] M. Pustilnik, et al., Phys. Rev. Lett. 119, 116802 (2017).
[2] K. Michaeli, et al., Phys. Rev. B 96, 205403 (2017).

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Presenters

  • Connie Hsueh

    • Department of Applied Physics, Stanford University

Authors

  • Connie Hsueh

    • Department of Applied Physics, Stanford University

  • Asbjorn C. C. Drachmann

    • Center for Quantum Devices and Station Q Copenhagen, Niels Bohr Institute, University of Copenhagen
    • Center for Quantum Devices and Station Q Copenhagen, Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen, Denmark
    • Center for Quantum Devices and Station Q Copenhagen, University of Copenhagen

  • Candice Thomas

    • Department of Physics and Astronomy and Station Q Purdue, Purdue University
    • Department of Physics and Astronomy, Purdue University
    • Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907 USA
    • Department of Physics and Astronomy and Station Q Purdue, Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, USA
    • Department of Physics and Astronomy, Station Q Purdue, and Birck Nanotechnology Center, Purdue University

  • Geoffrey C. Gardner

    • Microsoft
    • Microsoft Quantum at Station Q Purdue, Purdue University
    • Microsoft Quantum at Station Q Purdue, Purdue University, West Lafayette, Indiana 47907, USA
    • Microsoft Station Q Purdue
    • Birck Nanotechnology Center, Purdue University
    • Department of Physics and Astronomy, Purdue University
    • Microsoft Quantum at Station Q Purdue, Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, USA
    • Purdue University, Station Q Purdue

  • Tian Wang

    • Department of Physics and Astronomy and Station Q Purdue, Purdue University
    • Department of Physics and Astronomy, Purdue University
    • Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907 USA
    • Microsoft Station Q Purdue
    • Birck Nanotechnology Center, Purdue University

  • Sergei Gronin

    • Microsoft
    • Microsoft Quantum at Station Q Purdue, Purdue University
    • Department of Physics and Astronomy, Purdue University
    • Microsoft Quantum at Station Q Purdue, Purdue University, West Lafayette, Indiana 47907, USA
    • Microsoft Station Q Purdue
    • Department of Physics and Astronomy and Station Q Purdue, Purdue University

  • Michael Manfra

    • Purdue University
    • Microsoft
    • Department of Physics and Astronomy and Station Q Purdue, Purdue University
    • Department of Physics and Astronomy, Purdue University
    • Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907 USA
    • Microsoft Station Q Purdue
    • Physics and Astronomy, Purdue University
    • Department of Physics and Astronomy, School of Materials Engineering and School of Electrical and Computer Engineering, Purdue University
    • Station Q Purdue and Department of Physics and Astronomy, Purdue University
    • Dept. of Physics, Purdue University
    • Department of Physics and Astronomy and Station Q Purdue, Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, USA
    • Dept. of Physics and Astronomy, Purdue
    • Purdue University, Station Q Purdue
    • Department of Physics and Astronomy, Station Q Purdue, and Birck Nanotechnology Center, Purdue University

  • Charles M Marcus

    • Microsoft
    • Center for Quantum Devices and Station Q Copenhagen, Niels Bohr Institute, University of Copenhagen
    • Center for Quantum Devices, University of Copenhagen
    • Center for Quantum Devices and Station Q Copenhagen, Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen, Denmark
    • Center for Quantum Devices and Microsoft Quantum Lab--Copenhagen, Niels Bohr Institute, University of Copenhagen
    • Niels Bohr Institute, University of Copenhagen
    • Niels Bohr Institute
    • Center for Quantum Devices, Niels Bohr Institute
    • Center for Quantum Devices, Station Q Copenhagen, Niels Bohr Institute, University of Copenhagen
    • Center for Quantum Devices and Microsoft Quantum Lab–Copenhagen, Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, Denmark
    • University of Copenhagen
    • Center for Quantum Devices and Station Q Copenhagen, University of Copenhagen

  • David Goldhaber-Gordon

    • Stanford University
    • Department of Physics, Stanford University
    • Stanford University, USA
    • Physics, Stanford University