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Transport and spectroscopy of junction Andreev bound states in half-shell nanowire transmon devices

ORAL

Abstract

Semiconductor/superconductor hybrid nanowire-based devices in a cQED implementation are a promising platform for the detection of properties related to topological superconductivity. Here we study a gate-controlled Josephson junction, formed by selectively removing Al in a lithographically defined segment of a hybrid InAs/Al half-shell nanowire. The junction is incorporated in a transmon device geometry which enables both low-frequency transport studies and coherent time domain qubit control via cQED techniques. Variation of voltages on nearby electrostatic gates allows for drastic changes in the qubit frequency response as function of parallel magnetic field. The effects observed experimentally are in agreement with a theoretical model that suggests flux-modulated energies of Andreev bound states within the junction.

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Presenters

  • Alisa Danilenko

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

Authors

  • Alisa Danilenko

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

  • Deividas Sabonis

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

  • Georg W Winkler

    Microsoft Quantum, Microsoft Station Q, University of California Santa Barbara, Santa Barbara, CA 93106, USA

  • Oscar Erlandsson

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

  • Anders Kringhøj

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

  • Bernard Van Heck

    Quantum Lab Delft, Microsoft, Microsoft, Quantum lab Delft, Microsoft, Microsoft Quantum Lab Delft, Delft University of Technology, 2600 GA Delft, The Netherlands

  • Peter Krogstrup

    Center for Quantum Devices and Microsoft Quantum Lab Copenhagen, Niels Bohr Institute, University of Copenhagen, Microsoft Quantum Materials Lab and Center for Quantum Devices, Niels Bohr Institute,8University of Copenhagen, Kanalvej 7, 2800 Kongens Lyngby, Denmark, Niels Bohr Institute, University of Copenhagen, Quantum Materials Lab Copenhagen, Microsoft, University of Copenhagen, Center for Quantum Devices and Microsoft Quantum Lab Copenhagen, Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, Denmark, Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen, Microsoft Quantum Materials Lab, University of Copenhagen, Niels Bohr Institute, Copenhagen, Niels Bohr Institute

  • Charles M Marcus

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