Theory of continuum percolation II. Mean field theory

Details Theory of continuum percolation II. Mean field theory Theory of continuum percolation II. Mean field theory

1996-06-26

arxiv.org/abs/cond-mat/9606196v1

Phys Rev E 54 (1996) 6003

Physics

Condensed Matter

25 pages, Latex

Scientific paper

10.1103/PhysRevE.54.6003

I use a previously introduced mapping between the continuum percolation model and the Potts fluid to derive a mean field theory of continuum percolation systems. This is done by introducing a new variational principle, the basis of which has to be taken, for now, as heuristic. The critical exponents obtained are $\beta= 1$, $\gamma= 1$ and $\nu = 0.5$, which are identical with the mean field exponents of lattice percolation. The critical density in this approximation is $\rho_c = 1/\ve$ where $\ve = \int d \x \, p(\x) \{ \exp [- v(\x)/kT] - 1 \}$. $p(\x)$ is the binding probability of two particles separated by $\x$ and $v(\x)$ is their interaction potential.

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