arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0705.0112hep-th
收藏

动力学自耦合场论中的非拓扑孤子

Non-topological solitons in field theories with kinetic self-coupling

Joaquin Diaz-Alonso, Diego Rubiera-Garcia

摘要:

研究了一类具有动力学自耦合的非线性相对论拉格朗日场论的一些基本性质。我们把注意力集中在理论承认静态,球对称的解决方案,在三个空间维度是有限的能量和稳定的。我们确定这些非拓扑孤子解的存在性和稳定性的一般条件。特别是,我们进行了线性稳定性分析,超出了通常的德里克标准。在这些考虑的基础上,我们得到了上述一类非线性场论的孤子支持成员的完整表征。然后,我们根据孤立子场的中心和渐近行为对孤立子支持理论进行了分类,并提供了属于每个相应子族的模型的说明性明确的例子。在目前的工作中,我们限制我们的考虑,一个和多个组件的标量模型。我们证明了在这些情况下,有限能量静态球对称解对保电荷扰动是稳定的,只要模型的真空能量为零,能量密度是正定的。我们还简要讨论了扩展本方法的模型,涉及其他类型的字段,但详细研究这种更一般的情况下,将在一个单独的出版物。

英文摘要:

We investigate some fundamental features of a class of non-linear relativistic lagrangian field theories with kinetic self-coupling. We focus our attention upon theories admitting static, spherically symmetric solutions in three space dimensions which are finite-energy and stable. We determine general conditions for the existence and stability of these non-topological soliton solutions. In particular, we perform a linear stability analysis that goes beyond the usual Derrick-like criteria. On the basis of these considerations we obtain a complete characterization of the soliton-supporting members of the aforementioned class of non-linear field theories. We then classify the family of soliton-supporting theories according to the central and asymptotic behaviors of the soliton field, and provide illustrative explicit examples of models belonging to each of the corresponding sub-families. In the present work we restrict most of our considerations to one and many-components scalar models. We show that in these cases the finite-energy static spherically symmetric solutions are stable against charge-preserving perturbations, provided that the vacuum energy of the model vanishes and the energy density is positive definite. We also discuss briefly the extension of the present approach to models involving other types of fields, but a detailed study of this more general scenario will be addressed in a separate publication.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑