期刊
PHYSICS LETTERS B
卷 771, 期 -, 页码 277-280出版社
ELSEVIER
DOI: 10.1016/j.physletb.2017.04.076
关键词
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资金
- Perimeter Institute for Theoretical Physics
- Natural Sciences and Engineering Research Council of Canada
- Government of Canada through the Department of Innovation, Science and Economic Development Canada
- Province of Ontario through the Ministry of Research, Innovation and Science
By regarding the Einstein equations as equation(s) of state, we demonstrate that a full cohomogeneity horizon first law can be derived in horizon thermodynamics. In this approach both the entropy and the free energy are derived concepts, while the standard (degenerate) horizon first law is recovered by a Legendre projection from the more general one we derive. These results readily generalize to higher curvature gravities where they naturally reproduce a formula for the entropy without introducing Noether charges. Our results thus establish a way of how to formulate consistent black hole thermodynamics without conserved charges. (C) 2017 The Author(s). Published by Elsevier B.V.
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