中文

非线性Klein-Gordon方程中孤立波的稳定性

斑图形成与孤子 2022-11-30 v2 数学物理 math.MP

摘要

我们重新审视一维非线性Klein-Gordon系统中拓扑孤立波与脉冲的稳定性。描述静态解附近小偏差的线性化方程导出一个Sturm-Liouville问题,该问题对l(l+1)\sech2(x)-l\,(l+1)\,\sech^2(x)-势被系统性求解,展示了其解集合对所有lNl\in\mathbb{N}所满足的正交性与完备性关系。该方法可确定某些非线性Klein-Gordon方程扭结与脉冲的线性稳定性。我们引入了两类新颖的非线性Klein-Gordon势。即使非线性势未显式已知,这些势的精确解(扭结与脉冲)也被精确算出。发现新模型的扭结稳定,而脉冲不稳定。脉冲的稳定性通过引入特定空间非均匀性得以实现。

关键词

引用

@article{arxiv.2206.06910,
  title  = {Stability of solitary waves in nonlinear Klein-Gordon equations},
  author = {Pablo Rabán and Renato Alvarez-Nodarse and Niurka R. Quintero},
  journal= {arXiv preprint arXiv:2206.06910},
  year   = {2022}
}

备注

We update references (added several ones and deleted few of then) and include few paragraphs (mainly in the introduction) related with those references. Also several typos have been corrected and more simple notation has been introduced to make the manuscript easy to read. No changes in the main results