Regensburg 2019 – wissenschaftliches Programm

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BP: Fachverband Biologische Physik

BP 13: Active matter I (joint session BP/CPP/DY)

BP 13.6: Vortrag

Mittwoch, 3. April 2019, 10:45–11:00, H4

Memory-induced persistent motion — •Bernhard Georg Mitterwallner, Laura Lavacchi, and Roland Netz — Institut für theoretisch Physik, Frei Universität Berlin, Berlin, Germany

We investigate the mean-square displacement (MSD) for random motion governed by the generalized Langevin equation for different two-scale memory-kernel models: In the first model, the memory kernel consists of a delta peak and a single exponential and in the second model of the sum of two exponentials. In particular, we investigate the scenario where the long-time exponential kernel contribution is negative. The competition between positive and negative friction contributions produces an enhanced transient ballistic regime in the MSD, which is relevant for biological motility and active matter systems.