We propose an experiment to observe interference of a single electron as it is transported along two parallel quasi-one-dimensional channels trapped in a single minimum of a travelling periodic electric field. The experimental device is a modification of the surface acoustic wave (SAW) based quantum processor. Interference is achieved by creating a superposition of spatial wavefunctions between the two channels and inducing a relative phase shift via either a transverse electric field or a magnetic field. The interference can be used to estimate the decoherence time of an electron in this type of solid-state device.
@article{arxiv.quant-ph/0409219,
title = {Surface Acoustic Wave Single-Electron Interferometry},
author = {Roberta Rodriquez and Daniel K. L. Oi and Crispin H. W. Barnes and Masaya Kataoka and Toshio Ohshima and Artur K. Ekert},
journal= {arXiv preprint arXiv:quant-ph/0409219},
year = {2009}
}