Suppression of thermal noise in non-Markovian random velocity field
Journal of Statistical Mechanics: Theory and Experiment Volume 2016
Page 023206-
published_at 2016-02-25
Title
Suppression of thermal noise in non-Markovian random velocity field
Abstract
We study the diffusion of Brownian particles in a Gaussian random velocity field with short memory. By extending the derivation of an effective Fokker–Planck equation for the Lanvegin equation with weakly colored noise to a random velocity-field problem, we find that the effect of thermal noise on particles is suppressed by the existence of memory. We also find that the renormalization effect for the relative diffusion of two particles is stronger than that for single-particle diffusion. The results are compared with those of molecular dynamics simulations.
Creators
Ueda Masahiko
[e_rad]00826571
Affiliate Master
Yamaguchi University
[kakenhi]15501
grid.268397.1
Source Identifiers
[EISSN] 1742-5468
Creator Keywords
Diffusion
Non-Markovian process
Fokker–Planck equation
Languages
eng
Resource Type
departmental bulletin paper
Publishers
IOP Publishing
Date Issued
2016-02-25
Rights
© 2016 IOP Publishing Ltd and SISSA Medialab srl()
File Version
Accepted Manuscript
Access Rights
open access
Relations
[isVersionOf]
https://doi.org/10.1088/1742-5468/2016/02/023206
Funding Refs
Japan Society for the Promotion of Science
[crossref_funder]https://doi.org/10.13039/501100001691
Award
Nonequilibrium dynamics of soft matter and information