Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2006-06-27
Phys.Rev. D74 (2006) 084035
Physics
High Energy Physics
High Energy Physics - Theory
RevTex, 5 pages, accepted for publication in PRD
Scientific paper
10.1103/PhysRevD.74.084035
A finite action principle for Einstein-Gauss-Bonnet AdS gravity is presented. The boundary term, which is different for even and odd dimensions, is a functional of the boundary metric, intrinsic curvature and extrinsic curvature. For even dimensions, the boundary term corresponds to the maximal Chern form of the spacetime, and the asymptotic AdS condition for the curvature suffices for the well-posedness of this action. For odd dimensions, the action is stationary under a boundary condition on the variation of the extrinsic curvature. The background-independent Noether charges associated to asymptotic symmetries are found and the Euclidean continuation of the action correctly describes the black hole thermodynamics in the canonical ensemble. In particular, this procedure leads to a covariant formula for the vacuum energy in odd-dimensional asymptotically AdS spacetimes.
Kofinas Georgios
Olea Rodrigo
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