Dominance of extreme statistics in a prototype many-body Brownian ratchet

Autor:	Hohlfeld, Evan, Geissler, Phillip L.
Rok vydání:	2012
Předmět:	Condensed Matter - Statistical Mechanics Condensed Matter - Soft Condensed Matter Physics - Biological Physics Quantitative Biology - Subcellular Processes
Zdroj:	J. Chem. Phys. 141, 161101 (2014)
Druh dokumentu:	Working Paper
DOI:	10.1063/1.4899052
Popis:	Many forms of cell motility rely on Brownian ratchet mechanisms that involve multiple stochastic processes. We present a computational and theoretical study of the nonequilibrium statistical dynamics of such a many-body ratchet, in the specific form of a growing polymer gel that pushes a diffusing obstacle. We find that oft-neglected correlations among constituent filaments impact steady-state kinetics and significantly deplete the gel's density within molecular distances of its leading edge. These behaviors are captured quantitatively by a self-consistent theory for extreme fluctuations in filaments' spatial distribution. Comment: 5 pages with 3 figures + 20 pages of Supplementary Material with 2 figures. Updated to agree with published version; published as a Communication in J. Chem. Phys
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1204.1804 Zobrazit plný text záznamu View this record from Arxiv