2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/151816We show analytically and numerically that omission of quantum interference from the Chalker-Coddington model of the integer quantum Hall effect gives a localization length exponent nu=4/3 as in ordinary two-dimensional percolation. Thus, contrary to semi-classical scaling arguments, tunneling alone does not lead to nu=7/3.4 pages, LaTeX, 4 figures, PostscriptMesoscale and Nanoscale Physicstext