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Infinite hierarchy of exponents in a two-component random resistor network
Authors:Lucilla de Arcangelis  Antonio Coniglio
Affiliation:(1) Institute for Theoretical Physics, University of Cologne, 5000 Köln 41, West Germany;(2) Present address: Service de Physique Théorique, CEN, Saclay, 91191 Gif sur Yvette, France;(3) Dipartimento di Fisica, Università di Napoli, 80125 Napoli, Italy
Abstract:We have studied the voltage distribution for a two-component random mixture of conductances sgra and sgrb. A scaling theory is developed for the moments of the distribution, which predicts, for small values ofh=sgra/sgrb, an infinite number of crossover exponents, one for each moment, for Euclidean dimensiond >2, and only one crossover exponent ford=2. Monte Carlo results on the square lattice confirm this prediction.
Keywords:Percolation  two-component mixture  scaling theory  crossover exponent  voltage distribution  multifractality
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