Number of distinct sites visited by a subdiffusive random walker

Abstract

The asymptotic mean number of distinct sites visited by a subdiffusive continuous time random walker in two dimensions seems not to have been explicitly calculated anywhere in the literature. This number has been calculated for other dimensions for only one specific asymptotic behavior of the waiting time distribution between steps. We present an explicit derivation for two cases in all integer dimensions so as to formally complete a tableaux of results. In this tableaux we include the dominant as well as subdominant contributions in all integer dimensions. Other quantities that can be calculated from the mean number of distinct sites visited are also discussed.

4 pages; small changes

References in corpus (3)

• Kinetics of stochastically-gated diffusion-limited reactions and geometry of random walk trajectories
• Trapping reactions with subdiffusive traps and particles characterized by different anomalous diffusion exponents
• Some exact results for the trapping of subdiffusive particles in one dimension

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