The problem of describing the quantum behavior of gravity, and thus understanding
quantum spacetime, is still open. Loop quantum gravity is a well-developed approach to this …

We start by reviewing the existing literature on the creation of black holes during high-
energy particle collisions, both in the absence and in the presence of extra, compact …

We study a two-dimensional dilaton gravity system, recently examined by Almheiri and
Polchinski, which describes near-extremal black holes, or more generally, nearly A d S 2 …

A bstract We continue to investigate correspondences between, on the one hand, scattering
amplitudes for massive higher-spin particles and gravitons in appropriate quantum-to …

We study various aspects of wormholes that are made traversable by an interaction beween
the two asymptotic boundaries. We concentrate on the case of nearly‐gravity and discuss a …

A bstract In [1] we gave a precise holographic calculation of chaos at the scrambling time
scale. We studied the influence of a small perturbation, long in the past, on a two-sided …

A bstract We present the exact solution for the scattering problem in the flat space Jackiw-
Teitelboim (JT) gravity coupled to an arbitrary quantum field theory. JT gravity results in a …

A bstract This is the first paper in a series devoted to understanding the classical and
quantum nature of edge modes and symmetries in gravitational systems. The goal of this …

A bstract We extract the long-range gravitational potential between two scalar particles with
arbitrary masses from the two-to-two elastic scattering amplitude at 2nd Post-Minkowskian …

A bstract We explore the celestial holography proposal for non-trivial asymptotically flat
backgrounds including the Coulomb field of a static and spinning point charge, their …