Berlin 2005 – wissenschaftliches Programm
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AKB: Biologische Physik
AKB 100: Poster Session I
AKB 100.72: Poster
Samstag, 5. März 2005, 16:45–18:45, Poster TU D
Dimers in a 1-d lattice gas: a model for molecular motors collective dynamics — •Paolo Pierobon1,2, Thomas Franosch1, and Erwin Frey1,2 — 1Hahn-Meitner Institut, Abteilung Theorie, Glienicker Str.100, D-14109 Berlin, Germany — 2Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany
The transport of molecular motors along microtubules closely resembles the dynamics of a driven lattice gas of dimers without conservation of particles. The motion of the dimers is unidirectional, asymmetric and stochastic: its properties are encoded in the well studied totally asymmetric simple exclusion process (TASEP). We extend this model by including the possibility of attachment/detachment kinetics and the fact that as dimers they occupy two lattice sites. We study the stationary phase diagram by means of Monte Carlo simulations combined with a continuum description (based on an extended mean field theory). Novel unexpected regimes are identified, where the system is "frustrated".