Expansion Around the Mean-Field Solution of the Bak-Sneppen Model
Matteo Marsili, Paolo De Los Rios, Sergei Maslov
Abstract
We study a recently proposed equation for the avalanche distribution in the Bak-Sneppen model. We demonstrate that this equation indirectly relates τ,the exponent for the power law distribution of avalanche sizes, to D, the fractal dimension of an avalanche cluster.We compute this relation numerically and approximate it analytically up to the second order of expansion around the mean field exponents. Our results are consistent with Monte Carlo simulations of Bak-Sneppen model in one and two dimensions.
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