Gate-voltage tunable kinetic inductance in proximitized nanowires

ORAL

Abstract

Superconducting-semiconducting nanowires combine two frontiers of condensed matter in a hybrid state, which offers formidable possibilities for quantum computing and quantum sensing devices. In this talk, we study a quarter-wave coplanar waveguide resonator shunted by a hybrid Al-InAs nanowire. We show a gate voltage controllable resonance frequency and demonstrate a frequency shift of up to 8MHz. We relate the frequency shift to the change in kinetic inductance of the hybrid nanowire which arises from the gate-tunable hybridization of the superconductor to semiconductor interface. From our measurement result we extract the electron line density and the effective superconducting gap of the hybrid nanowire. The measurement technique demonstrated in this work complements existing characterization methods for hybrid nanowires and forms a promising path towards gate-controlled superconducting electronics.

*This activity has been co-financed by the allowance for Top consortia for Knowledge and Innovation (TKI’s) from the Dutch Ministry of Economic Affairs.

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Presenters

  • Lukas Johannes Splitthoff

    • Delft University of Technology
    • Qutech, Delft University of Technology

Authors

  • Lukas Johannes Splitthoff

    • Delft University of Technology
    • Qutech, Delft University of Technology

  • Arno Bargerbos

    • Delft University of Technology
    • Qutech, Delft University of Technology

  • Lukas Grunhaupt

    • Delft University of Technology

  • Marta Pita-Vidal

    • Delft University of Technology
    • Qutech, Delft University of Technology

  • Jaap J Wesdorp

    • Delft University of Technology
    • Qutech, Delft University of Technology

  • Yu Liu

    • Niels Bohr Institute, University of Copenhagen
    • University of Copenhagen and Microsoft Quantum Materials Lab Copenhagen
    • Niels Bohr Institute
    • University of Copenhagen
    • Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen

  • Peter Krogstrup

    • Microsoft Quantum Materials Lab Copenhagen
    • University of Copenhagen and Microsoft Quantum Materials Lab Copenhagen
    • ekrogst@microsoft.com
    • Quantum Materials Lab Copenhagen, Microsoft
    • Microsoft Quantum Materials Lab
    • Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen

  • Angela Kou

    • University of Illinois at Urbana-Champaign

  • Christian Kraglund K Andersen

    • Delft University of Technology
    • Delft University of technology

  • Bernard van Heck

    • Leiden University
    • Microsoft Corp
    • Microsoft Quantum lab Delft, University of Leiden