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Anomalous diffusion in run-and-tumble motion
Phys. Rev. E 86, 021117 – Published 16 August, 2012
DOI: https://doi.org/10.1103/PhysRevE.86.021117
Abstract
A random walk scheme, consisting of alternating phases of regular Brownian motion and Lévy walks, is proposed as a model for run-and-tumble bacterial motion. Within the continuous-time random walk approach we obtain the long-time and short-time behavior of the mean squared displacement of the walker as depending on the properties of the dwelling time distribution in each phase. Depending on these distributions, normal diffusion, superdiffusion, and ballistic spreading may arise.
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