Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2006-08-04
Phys.Rev. D74 (2006) 104032
Physics
High Energy Physics
High Energy Physics - Theory
Accepted to be published in Physical Review D. Minor changes
Scientific paper
10.1103/PhysRevD.74.104032
The main objective of this paper is to study thermodynamics and stability of static electrically charged Born-Infeld black holes in AdS space in D=4. The Euclidean action for the grand canonical ensemble is computed with the appropriate boundary terms. The thermodynamical quantities such as the Gibbs free energy, entropy and specific heat of the black holes are derived from it. The global stability of black holes are studied in detail by studying the free energy for various potentials. For small values of the potential, we find that there is a Hawking-Page phase transition between a BIAdS black hole and the thermal-AdS space. For large potentials, the black hole phase is dominant and are preferred over the thermal-AdS space. Local stability is studied by computing the specific heat for constant potentials. The non-extreme black holes have two branches: small black holes are unstable and the large black holes are stable. The extreme black holes are shown to be stable both globally as well as locally. In addition to the thermodynamics, we also show that the phase structure relating the mass $M$ and the charge $Q$ of the black holes is similar to the liquid-gas-solid phase diagram.
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