Universal properties of a run-and-tumble particle in arbitrary dimension.
Universal properties of a run-and-tumble particle in arbitrary dimension.
复制标题
任意维度中运行翻滚粒子的普遍性质。
DOI:
10.1103/physreve.102.042133
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
G. Schehr
中科院分区:
文献类型:
--
作者:
Francesco Mori;P. Le Doussal;S. Majumdar;G. Schehr
We consider an active run-and-tumble particle (RTP) in d dimensions, starting from the origin and evolving over a time interval [0,t]. We examine three different models for the dynamics of the RTP: the standard RTP model with instantaneous tumblings, a variant with instantaneous runs and a general model in which both the tumblings and the runs are noninstantaneous. For each of these models, we use the Sparre Andersen theorem for discrete-time random walks to compute exactly the probability that the x component does not change sign up to time t, showing that it does not depend on d. As a consequence of this result, we compute exactly other x-component properties, namely, the distribution of the time of the maximum and the record statistics, showing that they are universal, i.e., they do not depend on d. Moreover, we show that these universal results hold also if the speed v of the particle after each tumbling is random, drawn from a generic probability distribution. Our findings are confirmed by numerical simulations. Some of these results have been announced in a recent Letter [Phys. Rev. Lett. 124, 090603 (2020)10.1103/PhysRevLett.124.090603].
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DOI:
10.1088/1742-5468/aaf631
发表时间:
2018-10
期刊:
Journal of Statistical Mechanics: Theory and Experiment
影响因子:
--
作者:
E. Mallmin;R. Blythe;M. Evans
通讯作者:
E. Mallmin;R. Blythe;M. Evans
影响因子:
2.2
作者:
Zakhar Kabluchko;Vladislav Vysotsky;Dmitry Zaporozhets
通讯作者:
Dmitry Zaporozhets
影响因子:
44.1
作者:
Bechinger, Clemens;Di Leonardo, Roberto;Volpe, Giovanni
通讯作者:
Volpe, Giovanni
影响因子:
3.3
作者:
Palyulin, Vladimir V.;Blackburn, George;Chechkin, Aleksei V.
通讯作者:
Chechkin, Aleksei V.