We experimentally realize quantum Hall Mach-Zehnder interferometer which operates far beyond the equilibrium. The operation of the interferometer is based on allowed intra-edge elastic transitions within the same Landau sublevel in the regime of high imbalances between the co-propagating edge states. Since the every edge state is definitely connected with the certain Landau sublevel, the formation of the interference loop can be understood as a splitting and a further reconnection of a single edge state. We observe an Aharonov-Bohm type interference pattern even for low-size interferometers. This novel interference scheme demonstrates high visibility even at millivolt imbalances and survives in a wide temperature range.
@article{arxiv.1106.1340,
title = {A quantum Hall Mach-Zehnder interferometer far beyond the equilibrium},
author = {E. V. Deviatov and A. Ganczarczyk and A. Lorke and G. Biasiol and L. Sorba},
journal= {arXiv preprint arXiv:1106.1340},
year = {2015}
}