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DY: Fachverband Dynamik und Statistische Physik

DY 12: Posters DY - Fluid Physics, Active Matter, Complex Fluids, Soft Matter and Glasses (joint session DY/BP)

DY 12.20: Poster

Monday, March 22, 2021, 14:00–16:30, DYp

Effect of Alignment Activity on the Collapse Kinetics of a Flexible Polymer — •Subhajit Paul¹, Suman Majumder¹, Subir K Das², and Wolfhard Janke¹ — ¹Institut fuer Theoretische Physik, Universitaet Leipzig, Bruederstr. 16, D-04103, Leipzig, Germany — ²Theoretical Sciences Unit, JNCASR, Bangalore- 560064, India.

Dynamics of various biological filaments can be understood within the framework of active polymer models. Keeping this in mind, we construct a bead-spring flexible polymer chain in which the active interaction among the beads is introduced via an Vicsek-like alignment rule. Following a quench from the high-temperature coil phase to a low-temperature state, we study the non-equilibrium coarsening kinetics of this model via molecular dynamics (MD) simulations. For the passive polymer case the low-temperature equilibrium state is a compact globule. Results from our MD simulations reveal that though the globular state is also expected to be the typical final state in the active case as well, the non-equilibrium pathways change due to the alignment interaction among the beads. We observe that the probability of deviation from the intermediate *pearl-necklace*-like arrangement and the formation of more elongated dumbbell- like structures increases with increasing activity. Also, there exists nonmonotonicity in coarsening with the variation of the strength of activity. In this work, our focus is on such non-equilibrium dynamics results for which we compare with those of the passive case. These are concerning scaling laws related to collapse time and growth of clusters.