Discrete Multiscale Analysis: A Biatomic Lattice System

Details Discrete Multiscale Analysis: A Biatomic Lattice System Discrete Multiscale Analysis: A Biatomic Lattice System

2010-11-20

arxiv.org/abs/1011.4610v1

Journal of Nonlinear Mathematical Physics (JNMP) Volume: 17, Issue: 3(2010) pp. 357-377

Nonlinear Sciences

Pattern Formation and Solitons

Scientific paper

10.1142/S1402925110000957

We discuss a discrete approach to the multiscale reductive perturbative method and apply it to a biatomic chain with a nonlinear interaction between the atoms. This system is important to describe the time evolution of localized solitonic excitations. We require that also the reduced equation be discrete. To do so coherently we need to discretize the time variable to be able to get asymptotic discrete waves and carry out a discrete multiscale expansion around them. Our resulting nonlinear equation will be a kind of discrete Nonlinear Schr\"odinger equation. If we make its continuum limit, we obtain the standard Nonlinear Schr\"odinger differential equation.

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