Moduli-dependent one-loop entropy of hyperbolic BPS black hole in AdS${}_4$

Abstract

We study one-loop logarithmic corrections to the entropy of static hyperbolic BPS black holes in asymptotically AdS${}_4$ spacetime. Our analysis is carried out in a consistent real-scalar truncation of $\mathcal{N}=2$ Fayet-Iliopoulos gauged supergravity specified by the prepotential $F=-i{X}^0{X}^1$, which corresponds to an Einstein-Dilaton-Maxwell theory with a nontrivial scalar potential. In this model, the classical BPS attractor mechanism exhibits flat directions, leaving scalar moduli on the black hole horizon unfixed, while the Bekenstein-Hawking entropy depends only on the charges. We show that the resulting one-loop correction to the black hole entropy acquires a nontrivial dependence on the horizon moduli and induces an effective quantum potential that dynamically stabilizes them at a preferred value. Our results provide an explicit and concrete realization of quantum lifting of classical attractor flat directions in gauged supergravity.

24 pages + appendix; v2: Minor revisions, added references, and corrected typos