We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
No logarithmic corrections to entropy in shift-symmetric Gauss-Bonnet gravity.
- Authors
Liška, Marek; Hennigar, Robie A.; Kubizňák, David
- Abstract
Employing the covariant phase space formalism, we discuss black hole thermodynamics in four-dimensional scalar-tensor Einstein-Gauss-Bonnet gravity. We argue that logarithmic corrections to Wald entropy previously reported in this theory do not appear, due to the symmetry of the theory under constant shifts of the scalar field. Instead, we obtain the standard Bekenstein entropy of general relativity. Then, to satisfy the first law of black hole mechanics, the Hawking temperature must be modified. It has been proposed that such temperature modifications occur generically in scalar-tensor theories, due to different propagation speeds of gravitons and photons. We show that the temperature modifications also emerge in the Euclidean canonical ensemble approach to black hole thermodynamics. Notably, the boundary terms of the type we consider here can be considered in any scalar-tensor gravitational theories. Hence, we illustrate that adding a suitable boundary term to action may drastically affect black hole thermodynamics, changing both the entropy and the temperature.
- Subjects
EINSTEIN, Albert, 1879-1955; EINSTEIN-Gauss-Bonnet gravity; CANONICAL ensemble; BLACK holes; GENERAL relativity (Physics); SCALAR field theory; PHASE space; ENTROPY; TOPOLOGICAL entropy
- Publication
Journal of High Energy Physics, 2023, Vol 2023, Issue 11, p1
- ISSN
1126-6708
- Publication type
Article
- DOI
10.1007/JHEP11(2023)195