We review recent developments in Jackiw–Teitelboim gravity. This is a simple solvable
model of quantum gravity in two dimensions (that arises eg from the s-wave sector of higher …

Due to the failure of thermodynamics for low temperature near-extremal black holes, it has
long been conjectured that a'thermodynamic mass gap'exists between an extremal black …

A bstract We find models of two dimensional gravity that resolve the factorization puzzle and
have a discrete spectrum, whilst retaining a semiclassical description. A novelty of these …

A bstract An important open question in black hole thermodynamics is about the existence of
a “mass gap” between an extremal black hole and the lightest near-extremal state within a …

A bstract We study four-derivative corrections to five-dimensional minimal gauged
supergravity. We evaluate the on-shell action of the AdS 5 black hole solution with two …

Reproducing the integer count of black hole micro-states from the gravitational path integral
is an important problem in quantum gravity. In this paper, we show that, by using …

A bstract We show that an extremely generic class of two-dimensional conformal field
theories (CFTs) contains a sector described by the Schwarzian theory. This applies to …

Logarithmic corrections to the entropy of extremal black holes have been successfully used
to accurately match degeneracies from microscopic constructions to calculations of the …

A bstract Quantum extremal surfaces (QES), codimension-2 spacelike regions which
extremize the generalized entropy of a gravity-matter system, play a key role in the study of …

A bstract We study the behaviour of extremal and near-extremal black holes at low energies
and low temperatures and find that it can be understood from the near-horizon AdS 2 region …