High kinetic inductance resonators in the strong disorder limit

Strongly disordered superconductors are a promising playground for the fabrication of high kinetic inductance circuits and qubits. Upon increase of disorder one is able to achieve considerably large inductances with a simple fabrication process. However, when disorder is further increased thin films undergo a transition to insulation, accompanied by puzzling other features still debated to this day. It is therefore mandatory to have a better understanding of superconductivity in highly disordered films in view of application prospects. In this talk I discuss how strong disorder deeply modifies the superconducting state. By measuring the kinetic inductance of superconducting resonators made of amorphous indium oxide at very low temperature, we show that the transition to superconductivity is bosonic with a critical temperature ruled by superconducting phase fluctuations.