Holography at an Extremal De Sitter Horizon

Details Holography at an Extremal De Sitter Horizon Holography at an Extremal De Sitter Horizon

2009-10-23

arxiv.org/abs/0910.4587v1

JHEP 1003:096,2010

Physics

High Energy Physics

High Energy Physics - Theory

15 pages

Scientific paper

Rotating maximal black holes in four-dimensional de Sitter space, for which the outer event horizon coincides with the cosmological horizon, have an infinite near-horizon region described by the rotating Nariai metric. We show that the asymptotic symmetry group at the spacelike future boundary of the near-horizon region contains a Virasoro algebra with a real, positive central charge. This is evidence that quantum gravity in a rotating Nariai background is dual to a two-dimensional Euclidean conformal field theory. These results are related to the Kerr/CFT correspondence for extremal black holes, but have two key differences: one of the black hole event horizons has been traded for the cosmological horizon, and the near-horizon geometry is a fiber over dS_2 rather than AdS_2.

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