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 …

Abstract The Sachdev–Ye–Kitaev (SYK) model is a strongly coupled, quantum many-body
system that is chaotic, nearly conformally invariant, and exactly solvable. This remarkable …

We present exact results for partition functions of Jackiw-Teitelboim (JT) gravity on two-
dimensional surfaces of arbitrary genus with an arbitrary number of boundaries. The …

We generalize the recently discovered relationship between JT gravity and double-scaled
random matrix theory to the case that the boundary theory may have time-reversal symmetry …

A bstract The emergence of the bulk Hilbert space is a mysterious concept in holography. In
[1], the SYK model was solved in the double scaling limit by summing chord diagrams. Here …

A bstract We propose that a class of new topologies, for which there is no classical solution,
should be included in the path integral of three-dimensional pure gravity, and that their …

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 …

A bstract We rewrite the Chern-Simons description of pure gravity on global AdS 3 and on
Euclidean BTZ black holes as a quantum field theory on the AdS boundary. The resulting …

We study the quantum effects of Near-Extremal black holes near their horizons. The
gravitational dynamics in such backgrounds are closely connected to a particle in AdS 2 with …

A bstract Understanding the fate of semi-classical black hole solutions at very late times is
one of the most important open questions in quantum gravity. In this paper, we provide a …