6533b7d2fe1ef96bd125e9ee

RESEARCH PRODUCT

On fractional diffusion and continuous time random walks

Rudolf HilferRudolf Hilfer

subject

Statistics and ProbabilityAnomalous diffusionGaussianMathematical analysisCondensed Matter PhysicsRandom walkFractional calculussymbols.namesakeDistribution (mathematics)Time derivativesymbolsLimit (mathematics)Continuous-time random walkMathematics

description

Abstract A continuous time random walk model is presented with long-tailed waiting time density that approaches a Gaussian distribution in the continuum limit. This example shows that continuous time random walks with long time tails and diffusion equations with a fractional time derivative are in general not asymptotically equivalent.

https://doi.org/10.1016/s0378-4371(03)00583-1