Thermodynamics of Exotic Black Holes in Lovelock Gravity

TL;DR

This paper explores the thermodynamics of novel asymptotically AdS black holes with non-constant curvature horizons in Lovelock gravity, revealing unique phase behaviors and generalizations of known solutions.

Contribution

It introduces a new class of black holes in Lovelock gravity and analyzes their thermodynamic properties, including phase transitions and horizon geometry effects.

Findings

Discovery of triple points in 6D black hole thermodynamics.

Identification of a continuous set of triple points for charged black holes.

Generalization of massless and negative mass solutions in Lovelock gravity.

Abstract

We examine the thermodynamics of a new class of asymptotically AdS black holes with non-constant curvature event horizons in Gauss-Bonnet Lovelock gravity, with the cosmological constant acting as thermodynamic pressure. We find that non-trivial curvature on the horizon can significantly affect their thermodynamic behaviour. We observe novel triple points in 6 dimensions between large and small uncharged black holes and thermal AdS. For charged black holes we find a continuous set of triple points whose range depends on the parameters in the horizon geometry. We also find new generalizations of massless and negative mass solutions previously observed in Einstein gravity.