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arXiv · 1312.4122

Diffractons: solitary waves created by diffraction in periodic media

David I. Ketcheson·Manuel Quezada de Luna
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Abstract

A new class of solitary waves arises in the solution of nonlinear wave equations with constant impedance and no dispersive terms. They depend on a balance between nonlinearity and a dispersion-like effect due to spatial variation in the sound speed of the medium. A high-order homogenized model confirms this effective dispersive behavior and its solutions agree well with those obtained by direct simulation of the variable-coefficient system. These waves are observed to be long-time stable, globally attracting solutions that arise in general as solutions to nonlinear wave problems with periodically-varying sound speed. They share some properties with known classes of solitary waves, but possess important differences as well.

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David I. Ketcheson, Manuel Quezada de Luna. 2013-12-15. Diffractons: solitary waves created by diffraction in periodic media. https://arxiv.org/abs/1312.4122

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