Superdiffusion in self-reinforcing run-and-tumble model with rests.
Superdiffusion in self-reinforcing run-and-tumble model with rests.
复制标题
带休息的自我强化跑翻滚模型中的超扩散。
DOI:
10.1103/physreve.105.014126
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Fedotov S
中科院分区:
文献类型:
--
作者:
Fedotov S
This paper introduces a run-and-tumble model with self-reinforcing directionality and rests. We derive a single governing hyperbolic partial differential equation for the probability density of random-walk position, from which we obtain the second moment in the long-time limit. We find the criteria for the transition between superdiffusion and diffusion caused by the addition of a rest state. The emergence of superdiffusion depends on both the parameter representing the strength of self-reinforcement and the ratio between mean running and resting times. The mean running time must be at leastof the mean resting time for superdiffusion to be possible. Monte Carlo simulations validate this theoretical result. This work demonstrates the possibility of extending the telegrapher's (or Cattaneo) equation by adding self-reinforcing directionality so that superdiffusion occurs even when rests are introduced.
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影响因子:
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arXiv: Populations and Evolution
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