Anomalous diffusion in a symbolic model

Details Anomalous diffusion in a symbolic model Anomalous diffusion in a symbolic model

2011-02-21

arxiv.org/abs/1102.4306v1

Physics

Condensed Matter

Statistical Mechanics

Accepted for publication in Physica Scripta

Scientific paper

We address this work to investigate some statistical properties of symbolic sequences generated by a numerical procedure in which the symbols are repeated following a power law probability density. In this analysis, we consider that the sum of n symbols represents the position of a particle in erratic movement. This approach revealed a rich diffusive scenario characterized by non-Gaussian distributions and, depending on the power law exponent and also on the procedure used to build the walker, we may have superdiffusion, subdiffusion or usual diffusion. Additionally, we use the continuous-time random walk framework to compare with the numerical data, finding a good agreement. Because of its simplicity and flexibility, this model can be a candidate to describe real systems governed by power laws probabilities densities.

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