Mass, Entropy and Holography in Asymptotically de Sitter Spaces

Details Mass, Entropy and Holography in Asymptotically de Sitter Spaces Mass, Entropy and Holography in Asymptotically de Sitter Spaces

2001-10-11

arxiv.org/abs/hep-th/0110108v3

Phys.Rev. D65 (2002) 123508

Physics

High Energy Physics

High Energy Physics - Theory

31 pages, LaTeX. v2: references and acknowledgements added, rewrite of "RG flow vs. cosmological evolution" section, log diver

Scientific paper

10.1103/PhysRevD.65.123508

We propose a novel prescription for computing the boundary stress tensor and charges of asymptotically de Sitter (dS) spacetimes from data at early or late time infinity. If there is a holographic dual to dS spaces, defined analogously to the AdS/CFT correspondence, our methods compute the (Euclidean) stress tensor of the dual. We compute the masses of Schwarzschild-de Sitter black holes in four and five dimensions, and the masses and angular momenta of Kerr-de Sitter spaces in three dimensions. All these spaces are less massive than de Sitter, a fact which we use to qualitatively and quantitatively relate de Sitter entropy to the degeneracy of possible dual field theories. Our results in general dimension lead to a conjecture: Any asymptotically de Sitter spacetime with mass greater than de Sitter has a cosmological singularity. Finally, if a dual to de Sitter exists, the trace of our stress tensor computes the RG equation of the dual field theory. Cosmological time evolution corresponds to RG evolution in the dual. The RG evolution of the c function is then related to changes in accessible degrees of freedom in an expanding universe.

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