We propose a quantum tomography protocol to measure single electron coherence in quantum Hall edge channels and therefore access for the first time the wave function of single electron excitations propagating in ballistic quantum conductors. Its implementation would open the way to quantitative studies of single electron decoherence and would provide a quantitative tool for analyzing single to few electron sources. We show how this protocol could be implemented using ultrahigh sensitivity noise measurement schemes.
@article{arxiv.1010.2166,
title = {Single electron quantum tomography in quantum Hall edge channels},
author = {Charles Grenier and Rémy Hervé and Erwann Bocquillon and François D. Parmentier and Bernard Plaçais and Jean-Marc Berroir and Gwendal Fève and Pascal Degiovanni},
journal= {arXiv preprint arXiv:1010.2166},
year = {2011}
}
Comments
Version 3: long version (7 figures): corrections performed and references have been added. Figures reprocessed for better readability