The Universal Property of the Entropy Sum of Black Holes in All Dimensions

Abstract

It is proposed by Cvetic et al [Phys. Rev. Lett. 106 (2011) 121301] that the product of all horizon areas for general rotating multi-change black holes has universal expressions independent of the mass. When we consider the product of all horizon entropies, however, the mass will be present in some cases, while another new universal property [JHEP 1401 (2014) 031] is preserved, which is more general and says that the sum of all horizon entropies depends only on the coupling constants of the theory and the topology of the black hole. The property has been studied in limited dimensions and the generalization in arbitrary dimensions is not straight-forward. In this Letter, we prove a useful formula, which makes it possible to investigate this conjectured universality in arbitrary dimensions for the maximally symmetric black holes in general Lovelock gravity and $f(R)$ gravity. We also propose an approach to compute the entropy sum of general Kerr-(anti-)de-Sitter black holes in arbitrary dimensions. In all these cases, we prove that the entropy sum only depends on the coupling constants and the topology of the black hole.

arXiv comment16 pages,no figures;v2: 17 pages, references added, minor corrections/modifications; v3: 16 pages, added references, correct some expressons, added equation (16) to make the context more clear, to appear in PLB

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• Entropy Bound of Horizons for Accelerating, Rotating and Charged Plebanski-Demianski Black Hole
• Mass Dependence of the Entropy Product and Sum
• Thermodynamic approach to field equations in Lovelock gravity and f(R) gravity revisited
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• Area Functional Relation for 5D-Gauss-Bonnet-AdS Black Hole
• Generalized Hot Attractors
• Universal entropy relations: entropy formulae and entropy bound
• Notes on sums over horizons