Flat space holography
| Autor: | R B Mann |
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| Rok vydání: | 2008 |
| Předmět: | |
| Zdroj: | Canadian Journal of Physics. 86:563-570 |
| ISSN: | 1208-6045 0008-4204 |
| DOI: | 10.1139/p07-188 |
| Popis: | The implementation of holography in gravitational physics has its most concrete realization in the context of the anti-de Sitter/conformal field theory (AdS/CFT) correspondence conjecture, an implication of which is that counterterms from the boundary CFT can be understood as surface terms that render the variational principle finite and well-defined for the gravity theory in the bulk. I discuss recent developments that show how such gravitational counterterms can be deployed for asymptotically flat spacetimes in any spacetime dimension d ≥ 4. These actions yield conserved quantities at spacelike infinity that agree with the usual Arnowitt–Deser–Misner results but are more general. This approach removes the need for ill-defined background subtraction methods and suggests the possibility of obtaining a dual field theory to gravity theories in asymptotically flat spacetimes.PACS Nos.: 04.20.Ha, 04.60.–m, 11.25.Tq |
| Databáze: | OpenAIRE |
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