Berlin 2012 – wissenschaftliches Programm

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BP: Fachverband Biologische Physik

BP 3: Statistical Physics of Biological Systems I (with DY)

BP 3.6: Vortrag

Montag, 26. März 2012, 10:45–11:00, MA 001

Fluctuation-sensitive coarse-graining for stochastic dynamics — •Bernhard Altaner and Jürgen Vollmer — Max Planck Institut für Dynamik und Selbstorganisation, Göttingen

We consider Markov processes on a finite state space. Such stochastic processes can be viewed as a random walk on a network. Physically, the states represent a mesoscopic description as they summarize regions of phase space of an underlying microscopic dynamics. For non-equilibrium steady states, probability conservation gives rise to cyclic dynamics. Cycles connect the stochastic, mesoscopic description to the thermodynamic, macroscopic description. Here, we present a method for complexity reduction of the mesoscopic dynamics is where the new stochastic dynamics preserves the most important connections to the other scales. As an example, we consider the stochastic dynamics of the molecular motor protein kinesin.