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- Title
De Sitter Entropy in Higher Derivative Theories of Gravity.
- Authors
Gong, An; Liu, Kun; Shu, Fu-Wen
- Abstract
A theorem on higer-order derivative theories of gravity is proved. We find that the de Sitter/anti-de Sitter metric is always a solution of any generally covariant theory of gravity. With this theorem and a general form of entropy function for de Sitter spacetimes, we show how to calculate the entropy of de Sitter spacetime in a generally covariant theory of gravity without knowing the details of the modified metric. As an example, a general formula of dS entropy in Lovelock gravity is obtained.
- Subjects
GRAVITY; ENTROPY; SPACETIME; TOPOLOGICAL entropy
- Publication
Universe (2218-1997), 2023, Vol 9, Issue 3, p116
- ISSN
2218-1997
- Publication type
Article
- DOI
10.3390/universe9030116