Roberto Bondesan, Ilya A. Gruzberg, Jesper Lykke Jacobsen, Hideaki Obuse, Hubert Saleur
Critical properties of quantum Hall systems are affected by the presence of extra edge channels - 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.
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http://arxiv.org/abs/1109.4866
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