Microwave spectroscopy of Andreev states in InAs nanowire-based hybrid junctions using a flip-chip layout

Abstract

Josephson junctions, comprised of semiconducting nanowires, can be used to design qubit architectures but for the successful application, it is necessary to study their intrinsic excitation spectrum. Here, the authors adapt a flip-chip method to realize superconducting microwave circuits and perform spectroscopy of Andreev bound states in mesoscopic InAs/Al core/shell nanowire Josephson junctions.