Coalescence Model for Crumpled Globules Formed in Polymer Collapse
Soft Condensed Matter
2015-10-07 v2 Biological Physics
Abstract
The rapid collapse of a polymer, due to external forces or changes in solvent, yields a long-lived `crumpled globule.' The conjectured fractal structure shaped by hierarchical collapse dynamics has proved difficult to establish, even with large simulations. To unravel this puzzle, we study a coarse-grained model of in-falling spherical blobs that coalesce upon contact. Distances between pairs of monomers are assigned upon their initial coalescence, and do not `equilibrate' subsequently. Surprisingly, the model reproduces quantitatively the dependence of distance on segment length, suggesting that the slow approach to scaling is related to the wide distribution of blob sizes.
Cite
@article{arxiv.1503.04824,
title = {Coalescence Model for Crumpled Globules Formed in Polymer Collapse},
author = {Guy Bunin and Mehran Kardar},
journal= {arXiv preprint arXiv:1503.04824},
year = {2015}
}