L\'{e}vy walk dynamics in non-static media

Autor:	Zhou, Tian, Xu, Pengbo, Deng, Weihua
Rok vydání:	2021
Předmět:	Condensed Matter - Statistical Mechanics Physics - Classical Physics Physics - Data Analysis Statistics and Probability
Druh dokumentu:	Working Paper
DOI:	10.1088/1751-8121/ac3f8a
Popis:	Almost all the media the particles move in are non-static. Depending on the expected resolution of the studied dynamics and the amplitude of the displacement of the media, sometimes the non-static behaviours of the media can not be ignored. In this paper, we build the model describing L\'evy walks in non-static media, where the physical and comoving coordinates are connected by scale factor. We derive the equation governing the probability density function of the position of the particles in comoving coordinate. Using the Hermite orthogonal polynomial expansions, some statistical properties are obtained, such as mean squared displacements (MSDs) in both coordinates and kurtosis. For some representative non-static media and L\'{e}vy walks, the asymptotic behaviors of MSDs in both coordinates are analyzed in detail. The stationary distributions and mean first passage time for some cases are also discussed through numerical simulations. Comment: 13 pages, 10 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2110.07715 Zobrazit plný text záznamu View this record from Arxiv