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arXiv 0909.5435gr-qchep-th
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de Sitter空间

de Sitter Spaces

Andrew Randono

摘要:

我们利用引力作为de Sitter规范理论对称破缺相的解释来构造一阶场方程的新解。新的解决方案是通过执行大$Spin(4,1)$规范变换的普通德西特解决方案,并提取第一个四元组,然后诱导度规。这样得到的度量类是由整数$q$标记的无限类。每个解都满足定义常正曲率的局部场方程,因此只要度量是非退化的,它就局部等距于德西特空间。四元组和度规的简并结构反映了具有不同$q$的解之间的拓扑差异。通过拓扑论证,我们证明了这些解在爱因斯坦-嘉当理论的对称性上是物理上不同的。最终,这种类型解的存在性可能是作为度规理论的引力与作为规范理论的引力的区别特征。

英文摘要:

We exploit an interpretation of gravity as the symmetry broken phase of a de Sitter gauge theory to construct new solutions to the first order field equations. The new solutions are constructed by performing large $Spin(4,1)$ gauge transformations on the ordinary de Sitter solution and extracting first the tetrad, then the induced metric. The class of metrics so obtained is an infinite class labelled by an integer, $q$. Each solution satisfies the local field equations defining constant positive curvature, and is therefore locally isometric to de Sitter space wherever the metric is non-degenerate. The degeneracy structure of the tetrad and metric reflects the topological differences among the solutions with different $q$. By topological arguments we show that the solutions are physically distinct with respect to the symmetries of Einstein-Cartan theory. Ultimately, the existence of solutions of this type may be a distinguishing characteristic of gravity as a metric theory versus gravity as a gauge theory.

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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