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arXiv 0909.5688gr-qchep-lathep-th
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离散引力中对称性的破缺与恢复

Breaking and restoring of diffeomorphism symmetry in discrete gravity

B. Bahr, B. Dittrich

摘要:

我们讨论了离散引力中双态对称性的命运。离散化通常会破坏同构对称性。这对可观察的内容和理论的规范表述产生了影响。然而,有可能构造离散的作用量,即所谓的完美作用量,具有精确的对称性,我们将回顾实现这一目标的第一步。

英文摘要:

We discuss the fate of diffeomorphism symmetry in discrete gravity. Diffeomorphism symmetry is typically broken by the discretization. This has repercussions for the observable content and the canonical formulation of the theory. It might however be possible to construct discrete actions, so--called perfect actions, with exact symmetries and we will review first steps towards this end.

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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