Eur. Phys. J. B (2012) 85: 388
https://doi.org/10.1140/epjb/e2012-30294-8

Regular Article

Investigation of energy relaxation in 1-D nonlinear lattices by wavelets

¹ Dicle University, Faculty of Science, Physics Department, 21280 Diyarbakır, Turkey
² Adnan Menderes University, Faculty of Science and Literature, Physics Department, 09100 Aydın, Turkey

^a e-mail: sibuli@yahoo.com

Received: 5 April 2012
Received in final form: 14 July 2012
Published online: 29 November 2012

Abstract

The movement and relaxation of the localized energy on FPU lattices have been studied by using Wavelet transforms methods. The energy relaxation mechanism for nonlinear chains involves the degradation of higher frequency excitations into lower frequencies. It is shown that low frequency modes decay more slowly in nonlinear chains. The wavelet spectrum exhibits a behavior involving the interplay of phonon modes and breather modes.