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          Institute: MPI für Gravitationsphysik     Collection: Canonical and Covariant Dynamics of Quantum Gravity     Display Documents



ID: 438203.0, MPI für Gravitationsphysik / Canonical and Covariant Dynamics of Quantum Gravity
Breaking and restoring of diffeomorphism symmetry in discrete gravity
Authors:Bahr, Benjamin; Dittrich, Bianca
Review Status:not specified
Audience:Not Specified
Abstract / Description: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.
Comment of the Author/Creator:to appear in the Proceedings of the XXV Max Born Symposium "The Planck Scale", Wroclaw, 29 June - 3 July, 2009
External Publication Status:unpublished
Document Type:Article
Communicated by:Bianca Dittrich
Affiliations:MPI für Gravitationsphysik/Canonical and Covariant Dynamics of Quantum Gravity
Identifiers:LOCALID:arXiv:0909.5688
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0909.5688v1.pdf  [64,00 Kb] [Comment:arXiv:0909.5688v1 [gr-qc]]  
 
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