One conjecture and two observations on de Sitter space

Details One conjecture and two observations on de Sitter space One conjecture and two observations on de Sitter space

2005-05-03

arxiv.org/abs/hep-th/0505020v5

JHEP0602:045,2006

Physics

High Energy Physics

High Energy Physics - Theory

12 pages, harvmac; references added; version for publication in JHEP

Scientific paper

10.1088/1126-6708/2006/02/045

We propose that the state represented by the Nariai black hole inside de Sitter space is the ground state of the de Sitter gravity, while the pure de Sitter space is the maximal energy state. With this point of view, we investigate thermodynamics of de Sitter space, we find that if there is a dual field theory, this theory can not be a CFT in a fixed dimension. Near the Nariai limit, we conjecture that the dual theory is effectively an 1+1 CFT living on the radial segment connecting the cosmic horizon and the black hole horizon. If we go beyond the de Sitter limit, the "imaginary" high temperature phase can be described by a CFT with one dimension lower than the spacetime dimension. Below the de Sitter limit, we are approaching a phase similar to the Hagedorn phase in 2+1 dimensions, the latter is also a maximal energy phase if we hold the volume fixed.

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