Symmetry-Breaking Motility
统计力学
2009-11-10 v2 细胞行为
摘要
Locomotion of bacteria by actin polymerization, and in vitro motion of spherical beads coated with a protein catalyzing polymerization, are examples of active motility. Starting from a simple model of forces locally normal to the surface of a bead, we construct a phenomenological equation for its motion. The singularities at a continuous transition between moving and stationary beads are shown to be related to the symmetries of its shape. Universal features of the phase behavior are calculated analytically and confirmed by simulations. Fluctuations in velocity are shown to be generically non-Maxwellian and correlated to the shape of the bead.
引用
@article{arxiv.cond-mat/0407741,
title = {Symmetry-Breaking Motility},
author = {Allen Lee and Ha Youn Lee and Mehran Kardar},
journal= {arXiv preprint arXiv:cond-mat/0407741},
year = {2009}
}
备注
4 pages, 2 figures, REVTeX; formatting of references corrected