Equilibrium mappings in polar-isotropic confined active particles

Autor:	Fily, Yaouen, Baskaran, Aparna, Hagan, Michael F.
Rok vydání:	2016
Předmět:	Condensed Matter - Soft Condensed Matter Condensed Matter - Statistical Mechanics
Druh dokumentu:	Working Paper
Popis:	Despite their fundamentally non-equilibrium nature, the individual and collective behavior of active systems with polar propulsion and isotropic interactions (polar-isotropic active systems) are remarkably well captured by equilibrium mapping techniques. Here we examine two signatures of equilibrium systems -- the existence of a local free energy function and the independence of the coarse- grained behavior on the details of the microscopic dynamics -- in polar-isotropic active particles confined by hard walls of arbitrary geometry at the one-particle level. We find that boundaries that possess concave regions make the density profile strongly dynamics-dependent and give it a nonlocal dependence on the geometry of the confining box. This in turn constrains the scope of equilibrium mapping techniques in polar-isotropic active systems. Comment: 8 pages, 5 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1612.08719 Zobrazit plný text záznamu View this record from Arxiv