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Non-Gaussian Distributions to Random Walk in the Context of Memory Kernels
被引:33
|作者:
dos Santos, Maike A. E.
[1
]
机构:
[1] Univ Fed Rio Grande do Sul, Inst Fis, Caixa Postal 15051, BR-91501970 Porto Alegre, RS, Brazil
关键词:
fractional diffusion equation;
memory kernels;
random walk;
diffusion models;
solution techniques;
anomalous diffusion;
ANOMALOUS DIFFUSION-MODELS;
BROWNIAN-MOTION;
KINETIC-THEORY;
TRANSPORT;
EQUATIONS;
D O I:
10.3390/fractalfract2030020
中图分类号:
O1 [数学];
学科分类号:
0701 ;
070101 ;
摘要:
The investigation of diffusive process in nature presents a complexity associated with memory effects. Thereby, it is necessary new mathematical models to involve memory concept in diffusion. In the following, I approach the continuous time random walks in the context of generalised diffusion equations. To do this, I investigate the diffusion equation with exponential and Mittag-Leffler memory-kernels in the context of Caputo-Fabrizio and Atangana-Baleanu fractional operators on Caputo sense. Thus, exact expressions for the probability distributions are obtained, in that non-Gaussian distributions emerge. I connect the distribution obtained with a rich class of diffusive behaviour. Moreover, I propose a generalised model to describe the random walk process with resetting on memory kernel context.
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页码:1 / 15
页数:15
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