Transport of localized vibrational energy in biopolymer models with rigidity

G. P. Tsironis, M. Ibañes, J. M. Sancho

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)

Abstract

We address energy localization and transport in discrete curvilinear chains that model biopolymers. We use a one-dimensional modified Fermi-Pasta-Ulam model that describes approximately dynamics in curved polymers with rigid angles and only first-neighbor interactions and investigate the existence of localized energy in the form of discrete breathers. We show that breathers propagate freely in low curvature regions of the chain while there is a critical curvature above which breathers rebounce elastically without however loosing their integrity. Furthermore, breathers traverse hairpin geometries that model β-sheet bends, adapting to the local curvature while modifying their propagation speed in the curved segment. These features are stable against small local polymer angle deformations and generally persist in the nonrigid angle chain.

Original languageEnglish
Pages (from-to)697-703
Number of pages7
JournalEurophysics Letters
Volume57
Issue number5
DOIs
Publication statusPublished - Aug 19 2002

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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