Berlin 2012 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 29: Posters II

DY 29.22: Poster

Donnerstag, 29. März 2012, 17:00–19:00, Poster A

Forced Kramers escape with memory friction — •Jakob Tómas Bullerjahn, Sebastian Sturm, Lars Wolff, and Klaus Kroy — Institut für Theoretische Physik, Universität Leipzig, Germany

Starting from a generalized Langevin equation with arbitrary memory kernel, we describe the irreversible escape from a potential well, driven by a time-dependent external force protocol. Our model is analytically tractable and rectifies the unphysical behaviour of the escape rate under large pulling forces present in established models of stochastic bond breaking [1,2]. Beyond the Markovian limit, our approach directly applies to subdiffusive biological systems such as semiflexible polymers or membranes.

[1] Dudko, Hummer, Szabo, Phys. Rev. Lett. 96, 108101 (2006)

[2] Freund, PNAS 106, 8818 (2009)