Coalescence Model for Crumpled Globules Formed in Polymer Collapse
Name
PhysRevLett.115.088303.pdf
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616.65 KB
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Author(s)
Bunin, Guy
Kardar, Mehran
Date Issued
August 2015
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Bunin, Guy, and Mehran Kardar. "Coalescence Model for Crumpled Globules Formed in Polymer Collapse." Phys. Rev. Lett. 115, 088303 (August 2015). © 2015 American Physical Society
Version
Final published version
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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.115.088303
