Geometric Thermodynamics of Kerr-AdS black hole with a Cosmological Constant as State Variable

Details Geometric Thermodynamics of Kerr-AdS black hole with a Cosmological Constant as State Variable Geometric Thermodynamics of Kerr-AdS black hole with a Cosmological Constant as State Variable

2012-04-17

arxiv.org/abs/1204.3696v1

The Abraham Zelmanov Journal. 5. 68-77 (2012)

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

10 pages, no figures. arXiv admin note: substantial text overlap with arXiv:1108.2205

Scientific paper

The thermodynamics of the Kerr-AdS black hole is reformulated within the context of the formalism of geometrothermodynamics (GTD) and the cosmological constant is considered as a new thermodynamical parameter. We conclude that the mass of the black hole corresponds to the total enthalpy of this system. Choosing appropriately the metric in the equilibrium states manifold, we study the phase transitions as a divergence of the thermodynamical curvature scalar. This approach reproduces the Hawking-Page transition and shows that considering the cosmological constant as a thermodynamical parameter does not contribute with new phase transitions.

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