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.
@article{arxiv.1212.6568,
title = {Coherent edge mixing and interferometry in quantum Hall bilayers},
author = {Stefano Roddaro and Luca Chirolli and Fabio Taddei and Marco Polini and Vittorio Giovannetti},
journal= {arXiv preprint arXiv:1212.6568},
year = {2016}
}