Weyl points in the multi-terminal Hybrid Superconductor-Semiconductor Nanowire devices

TL;DR

This paper explores the presence of Weyl singularities in multi-terminal superconductor-semiconductor nanowire devices, revealing their properties and how they can be controlled through device parameters, advancing topological quantum computing research.

Contribution

It demonstrates the existence and controllability of Weyl singularities in multi-terminal nanowire devices, a novel topological phenomenon in this context.

Findings

Abundance of Weyl singularities in intermediate-sized devices

Properties and emergence of Weyl singularities detailed

Singularities can be manipulated by changing setup parameters

Abstract

The technology of superconductor-semiconductor nanowire devices has matured in the last years in the quest for topological quantum computing. This makes it feasible to make more complex and sophisticated devices. We investigate multi-terminal superconductor-semiconductor wires to access feasibility of another topological phenomenon: Weyl singularities in their spectrum. We have found an abundance of Weyl singularities for devices with intermediate size of the electrodes. We describe their properties and the ways the singularities emerge and disappear upon variation of the setup parameters.