The totally asymmetric simple exclusion process on networks

• Published in: arXiv.org
• Main Authors: Neri, I, Kern, N, Parmeggiani, A
• Format: Paper Journal Article
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 23.06.2011
• Subjects: Apexes; Density distribution; Mathematical models; Phenomenology; Physics - Cellular Automata and Lattice Gases; Physics - Physics and Society; Physics - Statistical Mechanics; Quantitative Biology - Molecular Networks; Topology; Transport processes
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.1105.2905

We study the totally asymmetric simple exclusion process (TASEP) on complex networks, as a paradigmatic model for transport subject to excluded volume interactions. Building on TASEP phenomenology on a single segment and borrowing ideas from random networks we investigate the effect of connectivity on transport. In particular, we argue that the presence of disorder in the topology of vertices crucially modifies the transport features of a network: irregular networks involve homogeneous segments and have a bimodal distribution of edge densities, whereas regular networks are dominated by shocks leading to a unimodal density distribution. The proposed numerical approach of solving for mean-field transport on networks provides a general framework for studying TASEP on large networks, and is expected to generalize to other transport processes.