Speaker
Description
The thermodynamics of black holes in de Sitter space is complicated by the presence of multiple horizons and the absence of a globally defined timelike Killing vector. In this talk, I will revisit existing proposals for thermodynamic identities describing charged black holes in de Sitter space and discuss their shortcomings. In particular, the conventional choice of normalization of the timelike vector leads to the puzzling property that Nariai black holes have a vanishing temperature, at odds with the experience of a near-horizon observer. I will propose a resolution to this problem and derive new first laws of thermodynamics that are adapted to a physical, static observer in between the black hole and cosmological horizon. I will discuss the implications of these results on recent works studying quantum corrections to near-extremal de Sitter black holes.
| Other topic / keywords: | Quantum gravity |
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