A New Finite-Size Scaling Approach to Random Walks

Details A New Finite-Size Scaling Approach to Random Walks A New Finite-Size Scaling Approach to Random Walks

1993-09-16

arxiv.org/abs/cond-mat/9309020v1

Physics

Condensed Matter

26 pages, Revtex 3.0, 9 figures available upon request, Email:giacometti@padova.infn.it PURD-TH-93-07

Scientific paper

10.1088/0305-4470/27/7/009

We present a new finite-size scaling method for the random walks (RW) superseeding a previously widely used renormalization group approach, which is shown here to be inconsistent. The method is valid in any dimension and is based on the exact solution for the two-point correlation function and on finite size scaling. As an application, the phase diagram is derived for random walks with a surface-bulk interaction where the system has either a surface or a defect. Possible extensions to disordered systems are also discussed.

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