Andreev bound states in a semiconducting nanowire Josephson junction, Part II: Quantum jumps and Fermion parity switching

ORAL

Abstract

Proximitized semiconducting nanowires subject to magnetic field should display topological superconductivity and support Majorana zero modes which have non-Abelian braiding statistics. The conventional Andreev levels formed in such wires in the absence of field are a precursor to these exotic zero modes. The fermion-parity switching time of Andreev levels sets a lower bound on the bandwidth required for experiments aimed at harnessing non-Abelian braiding statistics. We demonstrate the observation of quantum jumps between even and odd-parity states of an individual Andreev bound state in a non-topological junction, providing a direct measurement of the state populations and the parity lifetime.

*Work supported by: ARO, ONR, AFOSR, EU Marie Curie and YINQE

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Authors

  • M. Hays

    • Department of Applied Physics, Yale University, New Haven, USA
    • Department of Applied Physics, Yale University

  • G. de Lange

    • Department of Applied Physics, Yale University, New Haven, USA
    • Department of Applied Physics, Yale University

  • K. Serniak

    • Department of Applied Physics, Yale University, New Haven, USA
    • Department of Applied Physics, Yale University

  • D.J. van Woerkom

    • QuTech and Kavli Institute of Nanoscience, Delft University of Technology, Delft, The Netherlands

  • J.I. V{\"a}yrynen

    • Yale University
    • Department of Physics, Yale University
    • Yale Univ
    • Department of Applied Physics, Yale University, New Haven, USA

  • B. van Heck

    • Yale University
    • Department of Physics, Yale University
    • Department of Applied Physics, Yale University, New Haven, USA

  • U. Vool

    • Department of Applied Physics, Yale University
    • Department of Applied Physics, Yale University, New Haven, USA

  • P. Krogstrup

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

  • J. NYG{\AA}RD

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

  • L. Frunzio

    • Department of Applied Physics, Yale University, New Haven, USA
    • Department of Applied Physics, Yale University
    • Yale University

  • A. Geresdi

    • QuTech and Kavli Institute of Nanoscience Delft
    • QuTech and Kavli Institute of Nanoscience, Delft University of Technology, Delft, The Netherlands

  • Leonid Glazman

    • Yale University
    • Department of Physics, Yale University
    • Yale Univ
    • Department of Applied Physics, Yale University, New Haven, USA
    • Department of Applied Physics, Yale University

  • M.H. Devoret

    • Yale University
    • Department of Applied Physics, Yale University, New Haven, USA
    • Department of Applied Physics, Yale University