Berlin 2018 – scientific programme
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DY: Fachverband Dynamik und Statistische Physik
DY 54: Statistical Physics of Biological Systems I (joint session BP/DY)
DY 54.3: Talk
Thursday, March 15, 2018, 10:00–10:15, H 2013
Shape of pinned polymer loops in an external force field — •Wenwen Huang1, Yen Ting Lin2, and Vasily Zaburdaev1 — 1Max Planck Institute for the Physics of Complex Systems, Dresden, Germany — 2Los Alamos National Laboratory, New Mexico, USA
We studied the shapes of pinned polymer loops subjected to a constant external force field. We show that the polymer density profile can be calculated analytically in agreement with the simulation results. Moreover, we calculated the distribution of gyration radius and found it to vary non-monotonically with the strength of the external force field: the distribution is broader for moderate forces and more narrow for strong and weak forces. Furthermore, we analyzed the gyration tensor of the polymer loop characterizing its overall shape and in particular two parameters called asphericity and the nature of asphericity. These parameters, along with the gyration radius, can be used to quantify experimental data.