Field Theory And Second Renormalization Group For Multifractals In Percolation

Details Field Theory And Second Renormalization Group For Multifractals In Percolation Field Theory And Second Renormalization Group For Multifractals In Percolation

1994-09-22

arxiv.org/abs/cond-mat/9409097v1

Phys. Rev. E 51, 4095-4104 (1995)

Physics

Condensed Matter

RevTex, 10 pages

Scientific paper

10.1103/PhysRevE.51.4095

The field-theory for multifractals in percolation is reformulated in such a way that multifractal exponents clearly appear as eigenvalues of a second renormalization group. The first renormalization group describes geometrical properties of percolation clusters, while the second-one describes electrical properties, including noise cumulants. In this context, multifractal exponents are associated with symmetry-breaking fields in replica space. This provides an explanation for their observability. It is suggested that multifractal exponents are ''dominant'' instead of ''relevant'' since there exists an arbitrary scale factor which can change their sign from positive to negative without changing the Physics of the problem.

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