C. Kaiser et L. Turban, FRACTAL DIMENSIONS OF CONFINED CLUSTERS IN 2-DIMENSIONAL DIRECTED PERCOLATION, Journal of physics. A, mathematical and general, 27(16), 1994, pp. 120000579-120000583
The fractal structure of directed percolation clusters, grown at the p
ercolation threshold inside parabolic-like systems, is studied in two
dimensions via Monte Carlo simulations. With a free surface at y = +/-
Cx(k) and a dynamical exponent z, the surface shape is a relevant pert
urbation when k < 1/z and the fractal dimensions of the anisotropic cl
usters vary continuously with k. Analytic expressions for these variat
ions are obtained using a blob picture approach.