arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1003.5730math-phmath.MP
收藏

关于形式路径积分的坐标依赖性

On the coordinate (in)dependence of the formal path integral

Theo Johnson-Freyd

摘要:

当在量子场论中讨论路径积分时,几乎总是假设场取向量丛中的值。当场在可能弯曲的纤维丛中取值时,形式路径积分对坐标的独立性变得不那么明显。在这篇主要针对数学家的短文中,我们首先简要回顾了拉格朗日经典场论和量子场论的概念,以及“形式”或“费曼图解”路径积分构造的标准坐标完整定义。然后,我们概述了以下声明的证明:正式的路径积分不依赖于坐标的选择,但只对纤维体积形式的选择。当形式路径积分定义为无紫外发散时,我们的大纲是一个诚实的证明。

英文摘要:

When path integrals are discussed in quantum field theory, it is almost always assumed that the fields take values in a vector bundle. When the fields are instead valued in a possibly-curved fiber bundle, the independence of the formal path integral on the coordinates becomes much less obvious. In this short note, aimed primarily at mathematicians, we first briefly recall the notions of Lagrangian classical and quantum field theory and the standard coordinate-full definition of the "formal" or "Feynman-diagrammatic" path integral construction. We then outline a proof of the following claim: the formal path integral does not depend on the choice of coordinates, but only on a choice of fiberwise volume form. Our outline is an honest proof when the formal path integral is defined without ultraviolet divergences.

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。

↑