Weak Non Self-Averaging Behaviour for Diffusion in a Trapping Environment

Details Weak Non Self-Averaging Behaviour for Diffusion in a Trapping Environment Weak Non Self-Averaging Behaviour for Diffusion in a Trapping Environment

1993-09-16

arxiv.org/abs/cond-mat/9309019v1

Physics

Condensed Matter

11 pages, Revtex 3.0, 5 figures available upon request, PURD-TH-93-02. Email:giacometti@padova.infn.it

Scientific paper

10.1103/PhysRevE.49.227

The statistics of equally weighted random paths (ideal polymer) is studied in $2$ and $3$ dimensional percolating clusters. This is equivalent to diffusion in the presence of a trapping environment. The number of $N$ step walks follows a log-normal distribution with a variance growing asymptotically faster than the mean which leads to a weak non self-averaging behaviour. Critical exponents associated with the scaling of the two-points correlation function do not obey standard scaling laws.

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