How universal is the fractional-quantum-Hall edge Luttinger liquid?

This article reports on our microscopic investigations of the edge of the f ractional quantum Hall state at filling factor nu = 1/3. We show that the i nteraction dependence of the wave function is well described in an approxim ation that includes mixing with higher composite-fermion Landau levels in t he lowest order. We then proceed to calculate the equal time edge Green fun ction, which provides evidence that the Luttinger exponent characterizing t he decay of the Green function at long distances is interaction dependent. The relevance of this result to tunneling experiments is discussed. (C) 200 1 Elsevier Science Ltd. All rights reserved.