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 …

Quantum black holes are described by a large number of macroscopically indistinguishable
microstates. Correlation functions of fields outside the horizon at long time separation probe …

Euclidean wormholes—geometries which connect disconnected boundaries—present a
challenge to a standard quantum mechanical interpretation of the theory. One potential …

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 …

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 …

We show that the presence of replica wormholes in the Euclidean path integral of gravity
leads to a non-perturbative violation of charge conservation for any global symmetry present …

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 …

A bstract We propose an exact quantization of two-dimensional Jackiw-Teitelboim (JT)
gravity by formulating the JT gravity theory as a 2D gauge theory placed in the presence of a …

A bstract We study the thermal partition function of Jackiw-Teitelboim (JT) gravity in
asymptotically Euclidean AdS 2 background using the matrix model description recently …