Acoustic and optical soliton excitations in the Peyrard-Bishop model of DNA dynamics with alternating A-T and G-C base pairs

Conrad B. Tabi, Alidou Mohamadou, Timoléon C. Kofané

Research output: Contribution to journalArticle

3 Citations (Scopus)


With an attempt to describe DNA dynamics in a more realistic way, we introduce an extended Peyrard-Bishop (PB) model which takes into account the possible alternation between AT and GC pairs. The out-of-phase motion is then described by a set of coupled discrete differential equations which implies the existence of optical and acoustic modes. Through the semi-discrete approximation, a complex Ginzburg-Landau (CGL) equation describes the dynamics of the base pairs. It is shown that, the more probable DNA dynamics occurs the optical mode, since it has a deep influence in energy exchange and collision phenomena.

Original languageEnglish
Pages (from-to)2201-2209
Number of pages9
JournalJournal of Computational and Theoretical Nanoscience
Issue number11
Publication statusPublished - Nov 1 2008


All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Computational Mathematics
  • Electrical and Electronic Engineering

Cite this