Comment on dynamical renormalization group approach to self-organized critical phenomena

Author: Ghaffari P.   Jeldtoft Jensen H.  

Publisher: Edp Sciences

E-ISSN: 1286-4854|35|5|397-398

ISSN: 0295-5075

Source: EPL (EUROPHYSICS LETTERS), Vol.35, Iss.5, 2010-03, pp. : 397-398

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Abstract

Diaz-Guilera described in an impressive letter how one can performthe renormalization group analysis in the presence of the singular Heaviside step function ${\mit\Theta}(E)$ [CITE]. The latterenters inevitably when one derives coarse-grained Langevin equationsfor the various cellular-automaton algorithms arising in the study ofself-organized criticality [CITE], [CITE].