Quantized charge pumping by surface acoustic waves in ballistic quasi-1D channels V. Kashcheyevs, A. Aharony and O. Entin-Wohlman Eur. Phys. J. B, 39 3 (2004) 385-396 Published online: 12 July 2004 DOI: 10.1140/epjb/e2004-00204-0