Superconducting Microwave Circuits with High Kinetic Inductance Materials in High Magnetic Fields

ORAL

Abstract

We report our experimental progress towards a semiconducting nanowire Josephson junction fluxonium. We fabricate co-planar waveguide and meander nanowire superconducting resonators from NbTiN and NbN thin films. These resonators exhibit a wide range of intrinsic quality factors based on fabrication methods, including lift off versus etching. They maintain their quality factors in finite magnetic fields. These thin-film resonators provide large kinetic-inductance boosts where they can be used as the large shunting inductor in a fluxonium qubit where the nonlinear element is either a conventional Al/AlOx/Al Josephson junction or a semiconducting nanowire weak link.

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Presenters

  • Azarin Zarassi

    University of Pittsburgh

Authors

  • Azarin Zarassi

    University of Pittsburgh

  • Jen-Feng Hsu

    University of Pittsburgh, Department of Physics and Astronomy, University of Pittsburgh

  • Tzu-Chiao Chien

    University of Pittsburgh, Department of Physics and Astronomy, University of Pittsburgh, Physics and Astronomy, University of Pittsburgh

  • Xi Cao

    University of Pittsburgh, Department of Physics and Astronomy, University of Pittsburgh, Physics and Astronomy, University of Pittsburgh

  • Michael Hatridge

    University of Pittsburgh, Department of Physics and Astronomy, University of Pittsburgh, Physics and Astronomy, University of Pittsburgh

  • Sergey M Frolov

    University of Pittsburgh, Department of Physics and Astronomy, University of Pittsburgh, Physics, Univ of Pittsburgh