Title:	Exploring topological insulators for interferometry
DNr:	NAISS 2025/22-75
Project Type:	NAISS Small Compute
Principal Investigator:	Sergey Ignatenko <sergey.ignatenko@liu.se>
Affiliation:	Linköpings universitet
Duration:	2025-01-23 – 2026-02-01
Classification:	10304
Keywords:

Abstract

Topological insulators are state of quantum matter, characterized by an electrically insulating interior and a conductive surface. This property offers robustness against impurities, beneficial for quantum information processing, though not yet explored for electronic device applications. In this project, a pair of constrictions connected in series is studied as an interferometer device. This device can probe electron wave properties, quantum coherence time, external strain, and ambient temperature. Electron transport and thermodynamic properties are calculated using the recursive Green’s function method. For realistic system parameters and sizes, it requires computational resources beyond those of a desktop computer. The results will provide fundamental insights into the physics of topological insulators and potential applications such as electronic interferometers.