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DY: Fachverband Dynamik und Statistische Physik
DY 22: Brownian motion and transport II
DY 22.10: Vortrag
Donnerstag, 26. März 2009, 12:45–13:00, ZEU 118
Disordered driven lattice gases with boundary reservoirs and Langmuir kinetics — •Philip Greulich1 and Andreas Schadschneider2,3 — 1Fachrichtung Theoretische Physik, Universität des Saarlandes, Saarbrücken, Germany — 2Institut für Theoretische Physik, Universität zu Köln, Köln, Germany — 3Interdisziplinäres Zentrum für komplexe Systeme, Universität Bonn, Bonn, Germany
The asymmetric simple exclusion process with additional Langmuir kinetics, i.e. attachment and detachment in the bulk, is a paradigmatic model for intracellular transport. Here we examine this model in the presence of randomly distributed inhomogeneities ('defects'). Using Monte Carlo simulations, we find a multitude of coexisting high- and low-density domains. The results are generic for one-dimensional driven lattice gases with short-range interactions and can be understood in terms of a local extremal principle for the current profile. This principle is used to determine current profiles and phase diagrams as well as statistical properties of ensembles of defect samples.