The effect of cubic potentials on discrete breathers in a mixed Klein-Gordon/Fermi-Pasta-Ulam chain  

作　　者：周倩 吕彬彬 田强 

机构地区：[1]Department of Physics,Beijing Normal University

出　　处：《Chinese Physics B》2010年第6期437-441,共5页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant No.10574011);the Foundation for Innovative Research Groups Foundation of Beijing Normal University

摘　　要：Nonlinearity has a crucial impact on the symmetry properties of dynamical systems. This paper studies a one-dimensional mixed Klein-Gordon/Fermi Pasta-Ulam diatomic chain using the expanded rotating plane-wave approximation and numerical calculations to determine the effect of cubic potentials on the symmetry properties of discrete breathers in this system. The results will be very useful to researchers in the field of numerical calculations on discrete breathers.Nonlinearity has a crucial impact on the symmetry properties of dynamical systems. This paper studies a one-dimensional mixed Klein-Gordon/Fermi Pasta-Ulam diatomic chain using the expanded rotating plane-wave approximation and numerical calculations to determine the effect of cubic potentials on the symmetry properties of discrete breathers in this system. The results will be very useful to researchers in the field of numerical calculations on discrete breathers.

关 键 词：one-dimensional mixed Klein-Gordon/Fermi Pasta-Ulam diatomic chain discrete breathers expanded rotating plane wave approximation symmetry 

分 类 号：O469[理学—凝聚态物理]