Spherically-Symmetric Random Walks in Noninteger Dimension

Details Spherically-Symmetric Random Walks in Noninteger Dimension Spherically-Symmetric Random Walks in Noninteger Dimension

1994-01-09

arxiv.org/abs/hep-lat/9401006v1

J.Math.Phys. 35 (1994) 4941-4963

Physics

High Energy Physics

High Energy Physics - Lattice

40 pages, 4 figures, plain tex, tared and uuencoded, WU-HEP 94

Scientific paper

10.1063/1.530824

A previous paper (hep-lat/9311011) proposed a new kind of random walk on a spherically-symmetric lattice in arbitrary noninteger dimension $D$. Such a lattice avoids the problems associated with a hypercubic lattice in noninteger dimension. This paper examines the nature of spherically-symmetric random walks in detail. We perform a large-time asymptotic analysis of these random walks and use the results to determine the Hausdorff dimension of the process. We obtain exact results in terms of Hurwitz functions (incomplete zeta functions) for the probability of a walker going from one region of the spherical lattice to another. Finally, we show that the probability that the paths of $K$ independent random walkers will intersect vanishes in the continuum limit if $D> {{2K}\over{K-1}}$.

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