Active noise-driven particles under ...
Type de document :
Article dans une revue scientifique: Article original
URL permanente :
Titre :
Active noise-driven particles under space-dependent friction in one dimension
Auteur(s) :
Breoni, D. [Auteur]
Löwen, H. [Auteur]
Blossey, Ralf [Auteur]
Unité de Glycobiologie Structurale et Fonctionnelle (UGSF) - UMR 8576
Löwen, H. [Auteur]
Blossey, Ralf [Auteur]

Unité de Glycobiologie Structurale et Fonctionnelle (UGSF) - UMR 8576
Titre de la revue :
Physical Review E
Nom court de la revue :
Phys. Rev. E
Numéro :
103
Éditeur :
American Physical Society (APS)
Date de publication :
2021-05-04
ISSN :
2470-0045
Discipline(s) HAL :
Sciences du Vivant [q-bio]
Résumé en anglais : [en]
We study a Langevin equation describing the stochastic motion of a particle in one dimension with coordinate x, which is simultaneously exposed to a space-dependent friction coefficient γ(x), a confining potential U(x) and ...
Lire la suite >We study a Langevin equation describing the stochastic motion of a particle in one dimension with coordinate x, which is simultaneously exposed to a space-dependent friction coefficient γ(x), a confining potential U(x) and nonequilibrium (i.e., active) noise. Specifically, we consider frictions γ(x)=γ0+γ1|x|p and potentials U(x)∝|x|n with exponents p=1,2 and n=0,1,2. We provide analytical and numerical results for the particle dynamics for short times and the stationary probability density functions (PDFs) for long times. The short-time behavior displays diffusive and ballistic regimes while the stationary PDFs display unique characteristic features depending on the exponent values (p,n). The PDFs interpolate between Laplacian, Gaussian, and bimodal distributions, whereby a change between these different behaviors can be achieved by a tuning of the friction strengths ratio γ0/γ1. Our model is relevant for molecular motors moving on a one-dimensional track and can also be realized for confined self-propelled colloidal particles.Lire moins >
Lire la suite >We study a Langevin equation describing the stochastic motion of a particle in one dimension with coordinate x, which is simultaneously exposed to a space-dependent friction coefficient γ(x), a confining potential U(x) and nonequilibrium (i.e., active) noise. Specifically, we consider frictions γ(x)=γ0+γ1|x|p and potentials U(x)∝|x|n with exponents p=1,2 and n=0,1,2. We provide analytical and numerical results for the particle dynamics for short times and the stationary probability density functions (PDFs) for long times. The short-time behavior displays diffusive and ballistic regimes while the stationary PDFs display unique characteristic features depending on the exponent values (p,n). The PDFs interpolate between Laplacian, Gaussian, and bimodal distributions, whereby a change between these different behaviors can be achieved by a tuning of the friction strengths ratio γ0/γ1. Our model is relevant for molecular motors moving on a one-dimensional track and can also be realized for confined self-propelled colloidal particles.Lire moins >
Langue :
Anglais
Audience :
Internationale
Vulgarisation :
Non
Établissement(s) :
Université de Lille
CNRS
CNRS
Équipe(s) de recherche :
Computational Molecular Systems Biology
Date de dépôt :
2022-01-24T10:16:23Z
2022-01-24T11:09:52Z
2022-01-24T11:09:52Z
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- P21.54 PhysRevE.103.052602.pdf
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