We review recent progress on the information paradox. We explain why exponentially small
correlations in the radiation emitted by a black hole are sufficient to resolve the original …

The advent of gravitational waves and black hole imaging has opened a new window into
probing the horizon scale of black holes. An important question is whether string theory …

Abstract The LIGO and Virgo Interferometers have so far provided 11 gravitational-wave
(GW) observations of black-hole binaries. Similar detections are bound to become very …

The black-hole information paradox provides one of the sharpest foci for the conflict between
quantum mechanics and general relativity and has become the proving-ground of would-be …

Deep conceptual problems associated with classical black holes can be addressed in string
theory by the “fuzzball” paradigm, which provides a microscopic description of a black hole …

Within general relativity, the unique stationary solution of an isolated black hole is the Kerr
spacetime, which has a peculiar multipolar structure depending only on its mass and spin …

A bstract We use the replica method to compute the entanglement entropy of a universe
without gravity entangled in a thermofield-double-like state with a disjoint gravitating …

A bstract We study linear massive scalar charged perturbations of Topological Stars in the
fuzzball and in the black hole (Black String) regimes. The objects that naturally couple to the …

A bstract In 1984,'t Hooft famously used a brickwall (aka stretched horizon) to compute black
hole entropy up to a numerical pre-factor. This calculation is sometimes interpreted as due to …

A bstract Topological stars, or top stars for brevity, are smooth horizonless static solutions of
Einstein-Maxwell theory in 5-d that reduce to spherically symmetric solutions of Einstein …