Berlin 2008 – wissenschaftliches Programm

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BP: Fachverband Biologische Physik

BP 11: Transport Processes

BP 11.5: Vortrag

Dienstag, 26. Februar 2008, 16:15–16:30, C 243

Driven transport on parallel lanes with particle exclusion and obstruction — •Anna Melbinger, Tobias Reichenbach, Thomas Franosch, and Erwin Frey — Arnold Sommerfeld Center for Theoretical Physics (ASC) and Center for NanoScience (CeNS), Department of Physics, Ludwig-Maximilians-Universität, München, Germany

Traffic phenomena emerge in intracellular transport, where molecular motors move along parallel one-dimensional filaments, serving as biological engines. Recently, we have proposed a prototypical model for transport on parallel lanes [1]. Here, we consider the situation where motors on the same lane exclude each other, while a certain obstruction, stemming e.g. from the interaction of the bigger cargo particles, occurs between motors adjacent on parallel lanes. Depending on the strength of the obstruction, a rich phase behavior emerges, with density separation between the lanes as well as domain walls in the density profiles of the individual lanes being feasible. We rationalize our observations in an analytic approach, and show an intimate relation between the current-density relation and the systems' phase diagrams.

[1] T. Reichenbach, T. Franosch, E. Frey, Phys. Rev. Lett. 97, 050603 (2006)