Berlin 2012 – scientific programme

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DY: Fachverband Dynamik und Statistische Physik

DY 22: Posters I

DY 22.41: Poster

Wednesday, March 28, 2012, 17:00–19:00, Poster A

Limited validity of the transient fluctuation theorem for instantaneous entropy differences in Langevin dynamics — •Hendrik Niemeyer and Jochen Gemmer — Universität Osnabrück, Barbarastraße 7, D-49069 Osnabrück

We investigate the validity of the transient fluctuation theorem for entropies which are only a function of the current state of the system ("instantaneous entropies"). While it is a well-known fact that the transient fluctuation theorem always holds for Langevin systems in non-equilibrium steady states (Kurchan, 1998) this is not true for Langevin systems featuring exponential relaxation and a naturally arising instantaneous entropy defintion which is quadratic in the observable of interest. The transient fluctuation theorem then only holds in the limit of small observation times and small entropy defintions starting far away from equilibrium.