Using superconducting circuits to measure Andreev bound states in SiGe nanowires
Abstract: Currently-available qubit platforms are limited by information loss to the environment. One avenue for decreasing qubit loss rates is to store quantum information in topological states that are fundamentally robust to local noise. Majorana zero modes are topological states that are theorized to exist in engineered superconductor/semiconductor systems. A prerequisite of Majorana zero modes is a high-transparency interface between the superconductor and semiconductor, which can be characterized by investigating Andreev bound states located inside of superconductor-semiconductor-superconductor junctions. My current project aims to measure the Andreev bound states in junctions based on 2-dimensional hole gases formed in SiGe. I will discuss our motivation for using SiGe nanowires and the experimental progress we have made toward building a device for Andreev bound state spectroscopy.
This talk is intended for local QIS researchers at the University of Illinois; please do not share it more broadly.
