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

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.