We present the experimental realization of different approaches to increase the amount of quantized current which is driven by surface acoustic waves through split gate structures in a two dimensional electron gas. Samples with driving frequencies of up to 4.7 GHz have been fabricated without a deterioration of the precision of the current steps, and a parallelization of two channels with correspondingly doubled current values have been achieved. We discuss theoretical and technological limitations of these approaches for metrological applications as well as for quantum logics.
@article{arxiv.cond-mat/0006487,
title = {Enhanced quantized current driven by surface acoustic waves},
author = {J. Ebbecke and G. Bastian and M. Blöcker and K. Pierz and F. J. Ahlers},
journal= {arXiv preprint arXiv:cond-mat/0006487},
year = {2009}
}