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arXiv math/0407356math.DSmath-phmath.MP
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可逆哈密顿系统的同宿轨道

Homoclinic Orbits in Reversible Hamiltonian Systems

Andre Fonseca, Gerson Francisco

摘要:

以微分方程u^4+au^2-u+f(u,b)=0为模型,研究了可逆哈密顿系统同调解的存在性.这里f是一个解析函数,a,b是实参数。这些方程在几种物理情况下是重要的,如孤子和偏微分方程的“有限能量”定态的存在。我们减少了计算这些轨道的问题,找到一个合适的集合的非稳定流形的交集,然后将其应用到具体的情况。没有任何形式的离散对称性的假设,这里开发的分析可以成功地采用标准方法失败的情况下。

英文摘要:

We study the existence of homoclic solutions for reversible Hamiltonian systems taking the family of differential equations u^4+au^2-u+f(u,b)=0 as a model. Here f is an analytic function and a, b real parameters. These equations are important in several physical situations such as solitons and in the existence of ``finite energy'' stationary states of partial differential equations. We reduce the problem of computing these orbits to that of finding the intersection of the unstable manifold with a suitable set and then apply it to concrete situations. No assumptions of any kind of discrete symmetry is made and the analysis here developed can be successfully employed in situations where standard methods fail.

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