Coherent edge mixing and interferometry in quantum Hall bilayers

TL;DR

This paper proposes a novel electron beam splitter in quantum Hall bilayers using inter-layer tunneling, enabling coherent edge mixing and interferometry with potential advantages over traditional quantum point contact devices.

Contribution

It introduces a new architecture for coherent edge mixing in quantum Hall bilayers leveraging inter-layer tunneling, expanding quantum interferometry techniques.

Findings

Design of a beam splitter using inter-layer tunneling

Potential for interferometric applications in quantum Hall systems

Advantages over traditional quantum point contact interferometers

Abstract

We discuss the implementation of a beam splitter for electron waves in a quantum Hall bilayer. Our architecture exploits inter-layer tunneling to mix edge states belonging to different layers. We discuss the basic working principle of the proposed coherent edge mixer, possible interferometric implementations based on existing semiconductor-heterojunction technologies, and advantages with respect to canonical quantum Hall interferometers based on quantum point contacts.