Description
Black hole thermodynamics provides a useful way to test whether different quantum-gravity-inspired resolutions of the classical singularity lead to distinguishable physics. In this talk, I will discuss the thermodynamics of polymerized vacuum regular black holes in asymptotically anti-de Sitter spacetime, with emphasis on their Hawking–Page phase structure.
The construction extends an effective loop quantum gravity-inspired vacuum framework to AdS spacetime. The auxiliary dust field is used only as a relational clock and does not act as a matter source, while spherical symmetry allows the vacuum dynamics to decompose into independent radial shells. This leads to a Birkhoff-type reconstruction: once the polymerization function, cosmological constant, and mass are fixed, the static geometry is uniquely determined. The resulting black holes are nonsingular and may contain either de Sitter or anti-de Sitter cores.
I will describe their thermodynamics in the extended phase space, focusing on the transition between thermal AdS and the black hole phase. For the models considered, the dominant transition remains of Hawking–Page type, but polymerization shifts the transition temperature by deforming the physical outer horizon branch and its endpoint structure. In the large-AdS radius regime, de Sitter-core solutions have a higher Hawking–Page temperature than their anti-de Sitter-core counterparts, while this ordering can change near the lower admissible range of the AdS scale. The main message is that regularity alone does not determine the thermodynamic phase structure; the details of the polymerized core matter.
Based on:
1) S. Bakhoda and I. Soranidis, Thermodynamics of polymerized vacuum regular black holes in anti-de Sitter spacetime, arXiv:2606.13167
| I am the presenting author | Yes |
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