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Alpha-Vacua, Black Holes, and AdS/CFT

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arxiv hep-th/0610133 v4 pith:D3WF3J3D submitted 2006-10-11 hep-th

Alpha-Vacua, Black Holes, and AdS/CFT

classification hep-th
keywords blackvacuaholessitteralpha-vacuainvolutionsschwarzschild-adsspacetimes
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The Schwarzschild, Schwarzschild-AdS, and Schwarzschild-de Sitter solutions all admit freely acting discrete involutions which commute with the continuous symmetries of the spacetimes. Intuitively, these involutions correspond to the antipodal map of the corresponding spacetimes. In analogy with the ordinary de Sitter example, this allows us to construct new vacua by performing a Mottola-Allen transform on the modes associated with the Hartle-Hawking, or Euclidean, vacuum. These vacua are the `alpha'-vacua for these black holes. The causal structure of a typical black hole may ameliorate certain difficulties which are encountered in the case of de Sitter alpha-vacua. For Schwarzschild-AdS black holes, a Bogoliubov transformation which mixes operators of the two boundary CFT's provides a construction of the dual CFT alpha-states. Finally, we analyze the thermal properties of these vacua.

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