Dresden 2006 – scientific programme

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CPP: Chemische Physik und Polymerphysik

CPP 8: SYMPOSIUM Nonequilibrium Phenomena in Soft-Condensed Matter

CPP 8.10: Talk

Tuesday, March 28, 2006, 16:30–16:45, ZEU Lich

A Fluctuation Theorem for Wet Granular Matter — •Axel Fingerle and Stephan Herminghaus — MPI for Dynamics and Self-Organization, Bunsenstr. 10, 37073 Göttingen, Germany

Alhough there are various formulations of fluctuation theorems extending the second law of thermodynamics, the time inversion symmetry of the equations of motion is the key principle in every derivation. Wet granular matter has been described successfully by the Minimal Capillary Model [S. Herminghaus, Adv. Phys., 54, 221 (2005)]. This dynamical system has a non-trivial time inversion map due to the hysteretic interaction by liquid bridges between grains. We present numerical results and give simple analytic arguments to determine why the exponential suppression of ‘violations’ of the second law remains valid even for a time inversion map that is non-local in time.