SKM 2021 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 8: Poster Session III

CPP 8.2: Poster

Mittwoch, 29. September 2021, 17:30–19:30, P

Analytical study of active semiflexible ring polymer — •Christian Anton Philipps, Roland Georg Winkler, and Gerhard Gompper — Forschungszentrum Jülich Institute of Biological Information Processing, Jülich, Germany

Nature provides a variety of active matter systems, with self-propelled agents consuming internal energy or extracting it from their vicinity for locomotion [1]. Examples on the cellular level are self-propelled semiflexible actomyosin ring-like filaments driven by myosin motors in the cytoskeleton. We present a theoretical study of an active ring polymer [2] with tangential propulsion, applying the continuous Gaussian semiflexible polymer model [3] and introducing periodic boundary conditions. By a normal-mode expansion, the ring polymer conformational and dynamical properties, emerging by the homogeneous active force and its interplay with rigidity, are determined. Remarkably, the ring conformations are unaffected by activity for any stiffness. In contrast to linear filaments, the center-of-mass motion is independent of propulsion. However, activity strongly influences the internal dynamics with a dominant rotational mode over several orders of magnitude in time for high activities. This corresponds to a rotational motion of the entire ring polymer. [1] R. G. Winkler, J. Elgeti, G. Gompper, J. Phys. Soc. Jpn. 86, 101014 (2017); [2] M. Mousavi, R. G. Winkler, G. Gompper, J. Chem. Phys. 150, 064913 (2019); [3] T. Eisenstecken, G. Gompper, R. G. Winkler, Polymers 8, 304 (2016).

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