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arXiv 2304.08360gr-qchep-thmath-phmath.MP
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挠率的协变自旋-宇称分解与路径积分

Covariant spin-parity decomposition of the Torsion and Path Integrals

Riccardo Martini, Gregorio Paci, Dario Sauro

AI总结:

本文针对挠率张量构造泛函测度,提出类似 York 的协变自旋-宇称分解,并在最大对称空间及 S^4 上精确计算相关泛函雅可比及其对数发散。

摘要:

我们提出了一种关于挠率张量的泛函测度。我们讨论了该场的 Wheeler-DeWitt 超度规的两种完全等价选择:第一种基于其代数分解,另一种则受挠率平行引力理论启发。该测度通过要求高斯积分归一化而得到形式化定义。为实现这一结果,我们通过构造一种新的、类似 York 的分解,将挠率张量拆分为其自旋-宇称本征态。当然,这种分解对任何具有与挠率相同对称性的张量都有更广泛的适用性。作为这一程序的结果,一个泛函雅可比行列式自然出现,其形式表达式在具有现象学意义的最大对称空间极限下被精确给出。我们还讨论了该雅可比行列式在 4 维球面 S^4 情形下的显式计算,并特别强调其对数发散。

英文摘要:

We propose a functional measure over the torsion tensor. We discuss two completely equivalent choices for the Wheeler-DeWitt supermetric for this field, the first one being based on its algebraic decomposition, the other inspired by teleparallel theories of gravity. The measure is formally defined by requiring the normalization of the Gaussian integral. To achieve such a result we split the torsion tensor into its spin-parity eigenstates by constructing a new, York-like, decomposition. Of course, such a decomposition has a wider range of applicability to any kind of tensor sharing the symmetries of the torsion. As a result of this procedure a functional Jacobian naturally arises, whose formal expression is given exactly in the phenomenologically interesting limit of maximally symmetric spaces. We also discuss the explicit computation of this Jacobian in the case of a $4$-dimensional sphere $S^4$ with particular emphasis on its logarithmic 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。

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