Breathers in one-dimensional nonlinear thermalized lattice with an energy gap

M. Eleftheriou; S. Flach; G. P. Tsironis

doi:10.1016/S0167-2789(03)00243-4

Breathers in one-dimensional nonlinear thermalized lattice with an energy gap

M. Eleftheriou, S. Flach, G. P. Tsironis

Department of Physics

Research output: Contribution to journal › Article › peer-review

24 Citations (Scopus)

Abstract

We study a model of a nonlinear lattice with an on-site potential that induces a breather gap, i.e. a frequency interval where breathers are unstable. The gap is determined numerically and after thermalization of the system we compute power spectra of local displacements. We find that the gap is clearly manifested at small couplings through a large spectral contribution in the linearized phonon region that is not shifted strongly with temperature.

Original language	English
Pages (from-to)	20-26
Number of pages	7
Journal	Physica D: Nonlinear Phenomena
Volume	186
Issue number	1-2
DOIs	https://doi.org/10.1016/S0167-2789(03)00243-4
Publication status	Published - Dec 1 2003

Keywords

Breathers
Spectral gap

ASJC Scopus subject areas

Statistical and Nonlinear Physics
Mathematical Physics
Condensed Matter Physics
Applied Mathematics

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AB - We study a model of a nonlinear lattice with an on-site potential that induces a breather gap, i.e. a frequency interval where breathers are unstable. The gap is determined numerically and after thermalization of the system we compute power spectra of local displacements. We find that the gap is clearly manifested at small couplings through a large spectral contribution in the linearized phonon region that is not shifted strongly with temperature.

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KW - Spectral gap

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