3 papers
hep-th2026
AdS Black Holes Are Short-Lived inside the Spectral Form Factor
José L. F. Barbón, José L. F. Barbón, Eduardo Velasco-Aja
We analyze the contribution of AdS black hole saddles to the spectral form factor of -dimensional CFTs with a gravity dual. At high temperatures, the analytically continued grav…
hep-th2025
Cosmology inside a black hole: adding matter on the brane
José L. F. Barbón, Ayan K. Patra, Juan F. Pedraza +1
Braneworlds inside an AdS black hole provide simple models where a closed cosmology can be encoded in a dual field theory. Previous studies have focused on pure-tension branes, whe…
hep-th2025
A Note on Black Hole Entropy and Wormhole Instabilities
J. L. F. Barbon, E. Velasco-Aja
We discuss recent approaches to the computation of black hole entropies through semiclassical estimates of appropriate state overlaps, saturated by Euclidean wormhole configuration…