Exact calculation of the anomalous dimension of the diffusion coefficient for a model of a random walk in a random potential
- 21 September 1989
- journal article
- Published by IOP Publishing in Journal of Physics A: General Physics
- Vol. 22 (18) , L899-L905
- https://doi.org/10.1088/0305-4470/22/18/010
Abstract
Renormalisation of a model of classical diffusion in a random potential is analysed. It is shown that at two dimensions the one-loop expression for the anomalous dimension of the diffusion coefficient is perturbatively exact leading to the coupling-dependent value 1/ nu =2+g/4 pi of the exponent nu .Keywords
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