Mapped Chebyshev pseudospectral method to study multiple scale phenomena
Abstract
In the framework of mapped pseudospectral methods, we introduce a new polynomial-type mapping function in order to describe accurately the dynamics of systems developing almost singular structures. Using error criteria related to the spectral interpolation error, the new polynomial-type mapping is compared against previously proposed mappings for the study of collapse and shock wave phenomena. As a physical application, we study the dynamics of two coupled beams, described by coupled nonlinear Schr\"odinger equations and modeling beam propagation in an atomic coherent media, whose spatial sizes differs up to several orders of magnitude. It is demonstrated, also by numerical simulations, that the accuracy properties of the new polynomial-type mapping outperforms in orders of magnitude the ones of the other studied mapping functions.
Cite
@article{arxiv.0706.3108,
title = {Mapped Chebyshev pseudospectral method to study multiple scale phenomena},
author = {Adrian Alexandrescu and Alfonso Bueno-Orovio and Jose R. Salgueiro and Victor M. Perez-Garcia},
journal= {arXiv preprint arXiv:0706.3108},
year = {2008}
}