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Magnetic-field-compatible hybrid superconducting circuits

Invited

Abstract

Hybrid circuits that incorporate semiconducting elements into superconducting circuits have recently provided new insights into mesoscopic superconductivity. Extending the capabilities of hybrid circuits to work in large magnetic fields would enable the investigation and control of spin-polarized and topological phenomena. In this talk, I will discuss our work building a magnetic-field-compatible nanowire-based fluxonium. We in-situ tune the Josephson energy of the fluxonium with an electrostatic gate and demonstrate operation of the fluxonium in magnetic fields up to 1T. We use the fluxonium spectrum to map out the dependence of the Josephson energy of the junction on magnetic field and also use it to observe the φ0-junction effect. Our work demonstrates the utility of hybrid superconducting circuits for exploring mesoscopic physics and paves the way for manipulating Majorana zero modes in these circuits.

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Presenters

  • Angela Kou

    Quantum Lab Delft, Microsoft, Microsoft Corp

Authors

  • Angela Kou

    Quantum Lab Delft, Microsoft, Microsoft Corp

  • Marta Pita-Vidal

    QuTech, Delft University of Technology, Delft University of Technology

  • Arno Bargerbos

    QuTech, Delft University of Technology, Delft University of Technology

  • Chung-Kai Yang

    Quantum Lab Delft, Microsoft, Microsoft Corp

  • David J. Van Woerkom

    Microsoft Quantum Lab Delft, Delft University of Technology, Quantum Lab Delft, Microsoft, Microsoft Corp

  • Wolfgang Pfaff

    Quantum Lab Delft, Microsoft, Microsoft Quantum Lab Delft, Delft University of Technology, Microsoft Corp

  • Nadia Haider

    QuTech and TNO, The Netherlands, Netherlands Organisation for Applied Scientific Research (TNO, Netherlands Organization for Applied Scientific Research

  • Peter Krogstrup

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

  • Leo P Kouwenhoven

    Dept. of Physics, Technical University, Delft, The Netherlands, Microsoft Quantum Lab Delft, Microsoft Quantum Lab Delft, Delft University of Technology, Microsoft Corp Delft, Quantum Lab Delft, Microsoft, Delft University of Technology, QuTech and Kavli Institute of Nanoscience, Delft University of Technology, Microsoft Corp

  • Gijs De Lange

    Microsoft Quantum Lab Delft, 2628 CJ, Delft, The Netherlands, Quantum Lab Delft, Microsoft, Applied Physics, Yale University, QuTech and Kavli Institute of Nanoscience, Delft University of Technology, Microsoft Corp