Multiple states of intrinsic localized modes

被引:26
作者
Kivshar, YS [1 ]
Champneys, AR
Cai, D
Bishop, AR
机构
[1] Australian Natl Univ, Res Sch Phys Sci & Engn, Canberra, ACT 0200, Australia
[2] Univ Bristol, Dept Engn Math, Bristol BS8 1TR, Avon, England
[3] NYU, Courant Inst Math Sci, New York, NY 10012 USA
[4] Univ Calif Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA
[5] Univ Calif Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA
来源
PHYSICAL REVIEW B | 1998年 / 58卷 / 09期
关键词
D O I
10.1103/PhysRevB.58.5423
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In the framework of the continuum approximation, localized modes in nonlinear lattices ("intrinsic localized modes'' or ''discrete breathers'') are described by the nonlinear Schrodinger, (NLS) equation. We go beyond this approximation and analyze what kind of qualitatively new effects can be introduced by discreteness. Taking into account the higher-order linear and nonlinear dispersion terms in the NLS equation derived from a lattice model, we predict the existence of bound states of intrinsic localized excitations. These bound: states of nonlinear localized modes are also found numerically for a discrete chain with linear and nonlinear cubic interparticle interaction.
引用
收藏
页码:5423 / 5428
页数:6
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