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DY: Fachverband Dynamik und Statistische Physik
DY 27: Statistical Physics far from Thermal Equilibrium - Part I
DY 27.2: Talk
Wednesday, March 18, 2015, 10:00–10:15, BH-N 334
Transverse waves discretize knot motion on a stretched polymer — •Raffaello Potestio1 and Luca Tubiana2 — 1Max Planck Institute for Polymer Research, Mainz, Germany — 2Josef Stefan Institute, Ljubljana, Slovenia
In recent years topological properties of polymers, in particular biopolymers such as proteins or DNA, have been investigated by means of computer simulations. At the same time, the capability of performing single molecule experiments has tremendously grown, allowing a direct verification of theoretical results. Most of the investigation effort, though, both from the theoretical as well as experimental point of view, has been focused on equilibrium properties. Now that technology allows one to reach unprecedented levels of time and space resolution, it would be of great interest to investigate the behavior of knotted polymers under non-equilibrium conditions.
In this talk I will present and discuss the numerical study of a model polymer, knotted and stretched, subject to forced oscillations. By varying the oscillation period of one extreme of the polymer, different dynamical phases are identified, characterized by varying diffusive behaviors of the knot. Specifically, a transition between a free diffusion state to a discretized jump dynamics is observed.