Probing coherent coupling of Majorana modes via single-electron photon assisted tunneling: Part 2

ORAL

Abstract

The coherent coupling between Majorana zero modes localized in distinct topological islands mixes the 1e charge states of islands. This coherent superposition of even and odd parity states is a necessary condition for the operation of topological qubits. We demonstrate the coherent coupling of zero modes in a superconducting double island created in a InAs/Al nanowire. This is achieved by tracking microwave induced charge transitions between the islands. The dispersion of photon assisted tunneling features is 1e periodic and shows the presence of an anti-crossing between even and odd parity charge states.
In this talk we will discuss microwave spectroscopy measurements in the presence of magnetic field and show that the 1e periodicity results from discrete zero-energy states which emerge in magnetic field.

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Presenters

  • David Van Zanten

    Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen

Authors

  • David Van Zanten

    Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen

  • Deividas Sabonis

    Center for Quantum Devices and Microsoft Quantum Lab–Copenhagen, Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, Denmark, University of Copenhagen

  • Judith Tabea Suter

    University of Copenhagen

  • Dmitry Pikulin

    Microsoft, Microsoft Quantum, Microsoft Station Q, University of California, Santa Barbara, Microsoft Station Q, Station Q, Microsoft, Microsoft Corp

  • Jukka Vayrynen

    Microsoft Station Q Santa Barbara, Station Q, Microsoft, Univ of California - Santa Barbara

  • Torsten Karzig

    Microsoft Station Q, Microsoft Quantum, Station Q, Microsoft Corp, Station Q, Microsoft, Station-Q, Microsoft Research, Microsoft Corp, Microsoft

  • Eoin C O'Farrell

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

  • Davydas Razmadze

    Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen

  • Karl D Petersson

    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, Microsoft Corp, Microsoft Quantum Research, Copenhagen

  • Peter Krogstrup

    Niels Bohr Institute, Center for Quantum Devices and Microsoft Quantum Lab--Copenhagen, Niels Bohr Institute, University of Copenhagen, Center for Quantum Devices, Niels Bohr Institute, Center for Quantum Devices and Station-Q Copenhagen, Niels Bohr Institute, University of Copenhagen, Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen, Station Q, Microsoft, Microsoft Corp

  • 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