title: Exact exponents for the spin quantum Hall transition in the presence of multiple edge channels.
abstract: Critical properties of quantum Hall systems are affected by the presence of extra edge channels-those that are present, in particular, at higher plateau transitions. We study this phenomenon for the case of the spin quantum Hall transition. Using supersymmetry, we map the corresponding network model to a classical loop model, whose boundary critical behavior was recently determined exactly. We verify predictions of the exact solution by extensive numerical simulations.
authors.affiliation: Institute de Physique Théorique, CEA Saclay, F-91191 Gif-sur-Yvette, France.
authors.forename: R
authors.initials: R
authors.lastname: Bondesan
authors.forename: I A
authors.initials: IA
authors.lastname: Gruzberg
authors.forename: J L
authors.initials: JL
authors.lastname: Jacobsen
authors.forename: H
authors.initials: H
authors.lastname: Obuse
authors.forename: H
authors.initials: H
authors.lastname: Saleur