A gate-tunable, field-compatible fluxonium

ORAL

Abstract

Hybrid superconducting circuits, which integrate non-superconducting elements into a circuit quantum electrodynamics (cQED) architecture, expand the possible applications of cQED and provide new insights into mesoscopic superconductivity. Extending the capabilities of hybrid flux-based circuits, which provide access to current-phase relations, to work in magnetic fields would be especially useful both as a probe of spin-polarized Andreev bound states and as a platform for topological qubits. Here, we build upon previous results on a magnetic-field compatible fluxonium with an electrostatically-tuned semiconducting nanowire as its non-linear element. We use our nanowire fluxonium as a sensitive probe to study phase slips in highly transparent Josephson junctions.

*Research co-funded by the allowance for Top consortia for Knowledge and Innovation (TKI’s) from the Dutch Ministry of Economic Affairs and the Microsoft Quantum initiative.

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Presenters

  • Marta Pita-Vidal

    • QuTech, Delft University of Technology

Authors

  • Marta Pita-Vidal

    • QuTech, Delft University of Technology

  • Arno Bargerbos

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

  • Tereza Vakhtel

    • Leiden University

  • Chung-Kai Yang

    • Quantum Lab Delft, Microsoft

  • David J. Van Woerkom

    • Quantum Lab Delft, Microsoft
    • Quantum lab Delft, Microsoft

  • Wolfgang Pfaff

    • University of Illinois at Urbana-Champaign
    • Department of Physics, University of Illinois Urbana-Champaign
    • University of Illinois Urbana-Champaign

  • Nadia Haider

    • Delft University of Technology
    • Netherlands Organization for Scientific Research (TNO)
    • Netherlands Organisation for Applied Scientific Research (TNO)

  • 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

  • Leo Kouwenhoven

    • Microsoft station Q Delft
    • Microsoft Station Q Delft
    • Quantum Lab Delft, Microsoft
    • Microsoft Quantum Lab Delft
    • Quantum lab Delft, Microsoft
    • Microsoft Corp
    • Station Q Delft, Microsoft

  • Gijs De Lange

    • Quantum Lab Delft, Microsoft
    • Quantum lab Delft, Microsoft
    • Microsoft Corp

  • 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

  • Angela Kou

    • Illinois Quantum Information Science and Technology Center, University of Illinois at Urbana-Champaign
    • University of Illinois at Urbana-Champaign