Compact breathers generator in one-dimensional nonlinear networks

TL;DR

This paper introduces an efficient scheme to generate and explicitly construct compact breather solutions in one-dimensional nonlinear lattices, including inhomogeneous profiles, extending previous homogeneous-only results.

Contribution

The work presents a novel generator scheme for 1D nonlinear lattices supporting both accidental and parametric compact breathers, including inhomogeneous solutions, with explicit examples.

Findings

Supported compact breather solutions for various lattice configurations.

Extended existence of parametric compact breathers to inhomogeneous profiles.

Provided explicit lattice examples with different unit cells supporting breathers.

Abstract

Nonlinear networks can host spatially compact time periodic solutions called compact breathers. Such solutions can exist accidentally (i.e. for specific nonlinear strength values) or parametrically (i.e. for any nonlinear strength). In this work we introduce an efficient generator scheme for one-dimensional nonlinear lattices which support either types of compact breathers spanned over a given number U of lattice's unit cells and any number of sites v per cell - scheme which can be straightforwardly extended to higher dimensions. This scheme in particular allows to show the existence and explicitly construct examples of parametric compact breathers with inhomogeneous spatial profiles -- extending previous results which indicated that only homogeneous parametric compact breathers exist. We provide explicit d=1 lattices with different v supporting compact breather solutions for U=1,2.