Berlin 2008 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 20: POSTERS Driven Soft Matter

CPP 20.20: Poster

Mittwoch, 27. Februar 2008, 16:00–18:30, Poster A

Large deviation functions for the entropy production in driven systems — •Jakob Mehl, Thomas Speck, and Udo Seifert — II. Institut für Theoretische Physik, Universität Stuttgart, Pfaffenwaldring 57/III, D-70550 Stuttgart

In stochastic thermodynamics, notions like work, heat, and entropy production can be defined along a single trajectory. For systems coupled to a heat bath and driven into a nonequilibrium steady state, we study the probability function for the entropy produced in the surrounding medium. In the long time limit, this probability function is determined through the large deviation function. Instead of obtaining the large deviation function from the probability function directly, we apply an operator technique. As an example for linear stochastic systems, we study a dumbell consisting of two particles connected through a spring in simple shear flow. As an example for non-linear systems, we focus on a single colloidal particle moving in a spatial periodic potential confined to one dimension by a toroidal trap.