Thermodynamic properties of black holes in de Sitter space

Understand

We study the thermodynamic properties of Schwarzschild-de Sitter (SdS) black hole and Reissner-Nordstr\"{o}m-de Sitter (RNdS) black hole in the view of global and effective thermodynamic quantities.

• Making use of the effective first law of thermodynamics, we can derive the effective thermodynamic quantities of de Sitter black holes.
• It is found that these effective thermodynamic quantities also satisfy Smarr-like formula.
• Especially, the effective temperatures are nonzero in the Nariai limit, which is consistent with the idea of Bousso and Hawking.