Regensburg 2007 – wissenschaftliches Programm
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BP: Fachverband Biologische Physik
BP 16: Poster Session I
BP 16.48: Poster
Dienstag, 27. März 2007, 17:00–19:30, Poster D
Driven transport through channels: Interaction effects — •Martin Körner1, Mario Einax1, Philipp Maass1, and Abraham Nitzan2 — 1Institut für Physik, Technische Universität Ilmenau, 98684 Ilmenau, Germany — 2School of Chemistry, The Sackler University of Science, Tel Aviv University, Tel Aviv 69978, Israel
Ionic transport through biological membranes is often modelled by one-dimensional hopping processes between binding sites supplied by a channel protein. This leads to a theoretical description in terms of a bridge that connects two particle reservoirs at different chemical potentials and along which particles can be transported by nearest neighbour hopping processes between sites at different energy levels. Using Monte-Carlo simulations, numerical solutions of the underlying master equation and analytical approximation methods, we study the current-voltage characteristics, current fluctuations and correlation effects in dependence of the chemical potential difference between the reservoirs. In particular the influence of the inhomogeneity of site energies and of the interactions between the particles is discussed.