General Relativity has shown an outstanding observational success in the scales where it
has been directly tested. However, modifications have been intensively explored in the …

More than 65 years ago, John Wheeler suggested that quantum uncertainties of the metric
would be of order one at the Planck scale, leading to large fluctuations in spacetime …

A bstract Bulk quantum fields are often said to contribute to the generalized entropy\(\frac
{A}{4 {G} _N}+{S} _ {\mathrm {bulk}}\) only at O (1). Nonetheless, in the context of …

A bstract When absorbing boundary conditions are used to evaporate a black hole in
AdS/CFT, we show that there is a phase transition in the location of the quantum Ryu …

A bstract In the 1980's, work by Coleman and by Giddings and Strominger linked the physics
of spacetime wormholes to 'baby universes' and an ensemble of theories. We revisit such …

The Event Horizon Telescope (EHT) collaboration has recently released the first image of a
black hole (BH), opening a new window onto tests of general relativity in the strong field …

A bstract We reformulate recent insights into black hole information in a manner
emphasizing operationally-defined notions of entropy, Lorentz-signature descriptions, and …

While singularities are inevitable in the classical theory of general relativity, it is commonly
believed that they will not be present when quantum gravity effects are taken into account in …

Structure at the horizon scale of black holes would give rise to echoes of the gravitational
wave signal associated with the postmerger ringdown phase in binary coalescences. We …

A bstract The evaporation of black holes raises a number of conceptual issues, most of them
related to the final stages of evaporation, where the interplay between the central singularity …