Regensburg 2025 – wissenschaftliches Programm
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BP: Fachverband Biologische Physik
BP 6: Active Matter II (joint session BP/CPP/DY)
BP 6.5: Vortrag
Montag, 17. März 2025, 16:15–16:30, H37
How localized active noises influence the conformations and dynamics of semiflexible filaments — •Shashank Ravichandir1, Jens-Uwe Sommer1,2, and Abhinav Sharma1,3 — 1Leibniz-Institut für Polymerforschung, 01069 Dresden, Germany — 2Technische Universität Dresden, 01069 Dresden, Germany — 3Universität Augsburg, 86159 Augsburg, Germany
The structure and dynamics of active polymers have been recently studied in some detail. In these works all the monomers are considered to be active. However, in most biological systems non-equilibrium fluctuations manifest as activity only at isolated locations within the polymer. There have been only few studies of such polymers, in which the active monomers occur periodically along the polymer contour. We consider arbitrary active-passive copolymers and isolate the effects of the number and locations of active monomers on the conformational and dynamical properties of polymers. We use Langevin dynamics simulations to calculate the end-to-end distance, radius of gyration, and mean-squared displacement of such semiflexible filaments and classify the various states of these polymers based on their conformational properties. We also present preliminary results of polymers in which the location of active monomer moves dynamically along the chain contour. This is an idealized model of biopolymers such as DNA, during DNA transcription, and microtubules, which are driven by kinetic motors that traverse along its length.
Keywords: active polymers; semiflexible polymers; brownian dynamics