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arXiv 2401.00780gr-qcmath.DG
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Riemann-Cartan 几何中的对称性

Symmetries in Riemann-Cartan Geometries

David D. McNutt, Alan A. Coley, Robert J. van den Hoogen

AI总结:

本文回顾 Riemann-Cartan 几何中对称性的研究方法,并给出所有静态与稳态球对称 Riemann-Cartan 几何以及允许七维对称群的球对称子类的新结果。

摘要:

Riemann-Cartan 几何是允许非零曲率和挠率张量的几何。这些几何已被研究作为物理学中潜在理论(包括量子引力理论)的几何框架,并且与 Riemann 几何相比具有许多重要差异。一个显著差异是,Riemann-Cartan 几何的对称性数量可能小于度规的 Killing 向量场数量。在本文中,我们将回顾对 Riemann-Cartan 几何中对称性的研究,以及用于确定允许给定对称群的几何的数学工具。作为示例,我们通过确定所有静态球对称和所有稳态球对称 Riemann-Cartan 几何来给出新结果。此外,我们还确定了允许七维对称群的球对称 Riemann-Cartan 几何的子类。

英文摘要:

Riemann-Cartan geometries are geometries that admit non-zero curvature and torsion tensors. These geometries have been investigated as geometric frameworks for potential theories in physics including quantum gravity theories and have many important differences when compared to Riemannian geometries. One notable difference, is the number of symmetries for a Riemann-Cartan geometry is potentially smaller than the number of Killing vector fields for the metric. In this paper, we will review the investigation of symmetries in Riemann-Cartan geometries and the mathematical tools used to determine geometries that admit a given group of symmetries. As an illustration, we present new results by determining all static spherically symmetric and all stationary spherically symmetric Riemann-Cartan geometries. Furthermore, we have determined the subclasses of spherically symmetric Riemann-Cartan geometries that admit a seven-dimensional group of symmetries.

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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