arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 2310.12907math-phgr-qcmath.MP
收藏

高阶微扰的变分框架

A variational framework for higher order perturbations

F. Chiaffredo, L. Fatibene, M. Ferraris, E. Ricossa, D. Usseglio

AI总结:

本文提出一个协变全局的变分框架,将微扰定义为配置丛上的垂直矢量场,通过流的级数展开处理任意阶微扰,并以球面测地线稳定性为例验证了方法的有效性。

摘要:

本文提出了一个用于场论中微扰的协变、全局变分框架。微扰被定义为配置丛上的垂直矢量场,它们能够精确地将解拖拽为解。微扰的流将解拖拽为解,并且被拖拽的微扰解可以按照流参数展开为级数,因此该框架包含任意阶的微扰。力学作为特例被包含在内。作为一个简单的应用,我们重新得到了关于球面 $S_2$ 上测地线稳定性的著名讨论。

英文摘要:

A covariant, global, variational framework for perturbations in field theories is presented. Perturbations are obtained as vertical vector fields on the configuration bundle and they drag, exactly, solution into solutions. The flow of a perturbation drags solutions into solutions and the dragged perturbed solutions can be expanded in a series with respect to the flow parameter, hence it contains perturbations at any order. Mechanics is included as a special case. As a simple application, we recover the well-known discussion about stability of geodesics on a sphere $S_2$.

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。

↑