Breaking and restoring of diffeomorphism symmetry in discrete gravity

Bahr, Benjamin; Dittrich, Bianca

doi:10.1063/1.3284371

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Breaking and restoring of diffeomorphism symmetry in discrete gravity

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Bahr, Benjamin
Canonical and Covariant Dynamics of Quantum Gravity, AEI Golm, MPI for Gravitational Physics, Max Planck Society;

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Dittrich, Bianca
Canonical and Covariant Dynamics of Quantum Gravity, AEI Golm, MPI for Gravitational Physics, Max Planck Society;

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Zitation

Bahr, B., & Dittrich, B. (2009). Breaking and restoring of diffeomorphism symmetry in discrete gravity. American Institute of Physics Conference Proceedings, 1196(1), 10-17.

Zitierlink: https://hdl.handle.net/11858/00-001M-0000-0013-611E-7

Zusammenfassung

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.