M. Oyarzo

On the Stability of Warped Anti-de Sitter Spaces in Supergravity

S. Maurelli, R. Noris, M. Oyarzo +3

We discuss the perturbative stability of warped anti-de Sitter (WAdS $_{3}$ ) spaces in three-dimensional gauged supergravity. To this end, we first derive the analogue of the Breitenl…

Multi-Boundary Spinning $A d S_{5}$ Black Holes, Strongly Coupled Plasma Balls and a dual locally de Sitter spacetime

Andrés Anabalón, Guillermo Buckle, Annelies Fullgraff +1

We construct a new family of exact spinning black hole solutions in five-dimensional General Relativity with a negative cosmological constant, which are dual to strongly coupled sp…

Supersymmetric Moduli Space and Vacua with Vector Fields in $D = 4$ Gauged $N = 8$ Supergravity

Andrés Anabalón, Stefano Maurelli, Marcelo Oyarzo +1

When fermions are taken to be anti-periodic along a spacelike $S^{1}$ in $A d S_{4}$ , certain ground states of the supergravity theory are described by AdS-soliton-like spacetimes. We st…

gr-qc2026

Neural-Spectral Discovery of Rotating Black Holes Beyond General Relativity

Felipe Agurto-Sepúlveda, Marcelo Oyarzo, Anxo Biasi +6

Finding rotating black hole solutions in higher-curvature theories of gravity is a problem of fundamental importance. Virtually every approach to reconcile gravity with quantum mec…

Deforming $AdS_{3} \times S^{3} \times T^{4}$ in Type IIB Supergravity

Stefano Maurelli, Ruggero Noris, Marcelo Oyarzo +1

We discuss some new results on the construction of supersymmetric solutions of Type IIB supergravity of the form $WAdS_{3} \times WS^{3} \times T^{4}$ , $WAdS_{3}$ and ${\rm…

Logarithmic corrections to the entropy of near-extremal black holes in Einstein-Gauss-Bonnet

Alejandro Alvarado, Andres Anabalon, Mariano Chernicoff +4

We compute the one-loop contribution to the semiclassical partition function of near-extremal, asymptotically AdS black holes in five-dimensional Einstein-Gauss-Bonnet gravity. In…

Moduli space of $N = 4$ Super Yang-Mills from AdS/CFT

Andrés Anabalón, Horatiu Nastase, Carlos Nunez +2

We study $N = 4$ super Yang-Mills theory compactified on a circle at zero temperature, with VEVs for two scalar bilinears and three independent current sources. We show that t…

(Iso)spin from Isospin in Top-Down Holography

Marcelo Oyarzo, Ricardo Stuardo

Motivated by the spin from isospin mechanism of Jackiw-Rebbi-Hasenfratz-'t Hooft, we study two SU(2) gauged supergravity solutions of the form $M_{d} \times S^{2}$ containing…

Warped-AdS $_{3}$ Near-Horizon Geometries From TsT Transformations

S. Maurelli, R. Noris, M. Oyarzo +1

We provide a string theory realisation of a two-parameter family of Type IIB supergravity solutions of the form $WAdS_{3} \times WS^{3} \times M_{4}$ , as near-horizon geometr…

cs.LG2025

Tessellation Groups, Harmonic Analysis on Non-compact Symmetric Spaces and the Heat Kernel in view of Cartan Convolutional Neural Networks

Pietro Fré, Federico Milanesio, Marcelo Oyarzo +2

In this paper, we continue the development of the Cartan neural networks programme, launched with three previous publications, by focusing on some mathematical foundational aspects…

On U-Folds and Their Construction

Stefano Maurelli, Ruggero Noris, Marcelo Oyarzo +1

We review a general paradigm for constructing U-fold backgrounds in (dimensionally reduced) Type IIB superstring theory, of the form $AdS_{d - 1} \times S^{1} \times S^{d}$ , with a m…

Supersymmetric Warped Solutions from Type IIB Orientifold Reduction

S. Maurelli, R. Noris, M. Oyarzo +2

We construct a family of supersymmetric solutions in Type IIB supergravity of the form $WAdS_{3} \times WS^{3} \times T^{4}$ , where $WAdS_{3}$ and $W S^{3}$ denote a war…

The Instability of Low-Temperature Black Holes in Gauged $N = 8$ Supergravity

Andrés Anabalón, Stefano Maurelli, Marcelo Oyarzo +1

We consider the static planar black hole solutions in the STU model of the gauged $N = 8$ supergravity in four dimensions. We give a straightforward derivation of the equat…

Existence of a supersymmetric extension of the gauged non-linear $Σ$ -model and the transition from integrability to chaos

Fabrizio Canfora, Nicolás Grandi, Marcelo Oyarzo

The non-linear $Σ$ -Model minimally coupled with Maxwell theory in $3 + 1$ dimensions possesses a topologically non-trivial sector characterized by ``lasagna''-like configurations. We…

Overflying Nilpotent Horizons

Jose Figueroa, Gaston Giribet, Anibal Neira-Gallegos +2

We study solutions of Einstein equations with negative cosmological constant in five dimensions that describe black holes whose event horizons are homogeneous, anisotropic spaces.…

gr-qc2024

Black Hole shadows of $α^{'}$ -corrected black holes

F. Agurto-Sepúlveda, J. Oliva, M. Oyarzo +1

In this paper we study the qualitative features induces by corrections to GR coming from String Theory, on the shadows of rotating black holes. We deal with the slowly rotating bla…