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Diffusion on loopless critical percolation cluster

S Mukherjee, D J Jacobs and H Nakanishi

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In this paper, we calculate the dynamical exponents of diffusion, dw/df and ds, on a percolation cluster at pc with no loops, for the square and simple cubic lattices by the method of spectral analysis of the transition probability matrix. Results show that ds varies significantly with the spatial dimension, unlike in conventional percolation, but the Alexander-Orbach scaling relation ds=2df/dw still holds. Thus it rules out the possibility that this scaling relation fails for all loopless fractals because of trapping.


PACS

05.45.Df Fractals

05.60.-k Transport processes

02.10.Yn Matrix theory

05.50.+q Lattice theory and statistics (Ising, Potts, etc.)

02.70.Hm Spectral methods

05.40.Fb Random walks and Levy flights

MSC

82B43 Percolation (See also 60K35)

28A80 Fractals (See also 37Fxx)

60J60 Diffusion processes (See also 58J65)

82B27 Critical phenomena

82B41 Random walks, random surfaces, lattice animals, etc. (See also 60G50, 82C41)

Subjects

Mathematical physics

Computational physics

Statistical physics and nonlinear systems

Dates

Issue 2 (21 January 1995)



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