Wave scattering by discrete breathers

被引：34

作者：

Flach, S ^{[1
]}

Miroshnichenko, AE ^{[1
]}

Fistul, MV ^{[1
]}

机构：

[1] Max Planck Inst Phys Komplexer Syst, Nothnitzer Str 38, D-01187 Dresden, Germany

来源：

CHAOS | 2003年 / 13卷 / 02期

关键词：

D O I：

10.1063/1.1561627

中图分类号：

O29 [应用数学];

学科分类号：

070104 ;

摘要：

We present a theoretical study of linear wave scattering in one-dimensional nonlinear lattices by intrinsic spatially localized dynamic excitations or discrete breathers. These states appear in various nonlinear systems and present a time-periodic localized scattering potential for plane waves. We consider the case of elastic one-channel scattering, when the frequencies of incoming and transmitted waves coincide, but the breather provides with additional spatially localized ac channels whose presence may lead to various interference patterns. The dependence of the transmission coefficient on the wave number q and the breather frequency Omega(b) is studied for different types of breathers: acoustic and optical breathers, and rotobreathers. We identify several typical scattering setups where the internal time dependence of the breather is of crucial importance for the observed transmission properties. (C) 2003 American Institute of Physics.

引用

页码：596 / 609

页数：14

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