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Modulational Instability and Pattern Formation in DNA Dynamics with Viscosity

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We report on the analytical and numerical investigation of modulational instability in discrete non-linear chains, taking the Peyrard-Bishop model of DNA dynamics as an example. It is shown that the original difference differential equation for the DNA dynamics can be reduced to the discrete complex Ginzburg-Landau equation. We derive the modulational instability criterion in this case. Numerical simulations show the validity of the analytical approach with the generation of wave packets provided that the wave number fall in the instability domain. We also show that, modulational instability leads to spontaneous localization of energy in DNA molecule.
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Keywords: DISCRETE COMPLEX GINZBURG-LANDAU EQUATION; DNA DYNAMICS; ENERGY LOCALIZATION; MODULATIONAL INSTABILITY

Document Type: Research Article

Publication date: 2008-04-01

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  • Journal of Computational and Theoretical Nanoscience is an international peer-reviewed journal with a wide-ranging coverage, consolidates research activities in all aspects of computational and theoretical nanoscience into a single reference source. This journal offers scientists and engineers peer-reviewed research papers in all aspects of computational and theoretical nanoscience and nanotechnology in chemistry, physics, materials science, engineering and biology to publish original full papers and timely state-of-the-art reviews and short communications encompassing the fundamental and applied research.
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