Title:	Active velocity processes with suprathermal stationary distributions and long-time tails
Authors:	Banerjee, Tirthankar Basu, Urna Maes, Christian
Issue Date:	Jun-2020
Publisher:	American Physical Society
Citation:	Physical Review E, 2020, Vol.101, Article No.062130
Abstract:	When a particle moves through a spatially-random force field, its momentum may change at a rate which grows with its speed. Suppose moreover that a thermal bath provides friction which gets weaker for large speeds, enabling high-energy localization. The result is a unifying framework for the emergence of heavy tails in the velocity distribution, relevant for understanding the power-law decay in the electron velocity distribution of space plasma or more generally for explaining non-Maxwellian behavior of driven gases. We also find long-time tails in the velocity autocorrelation, indicating persistence at large speeds for a wide range of parameters and implying superdiffusion of the position variable.
Description:	Open Access
URI:	http://hdl.handle.net/2289/7497
ISSN:	2470-0045 2470-0053 (Online)
Alternative Location:	https://ui.adsabs.harvard.edu/abs/2019arXiv191210780B/abstract https://arxiv.org/abs/1912.10780 https://doi.org/10.1103/PhysRevE.101.062130
Copyright:	2020 American Physical Society
Appears in Collections:	Research Papers (TP)

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