Semiclassical Virasoro Symmetry of the Quantum Gravity S-Matrix

TL;DR

This paper demonstrates that the tree-level quantum gravity S-matrix in four-dimensional Minkowski space exhibits a Virasoro symmetry acting on the conformal sphere at null infinity, revealing a new symmetry structure.

Contribution

It identifies a Virasoro symmetry in the tree-level quantum gravity S-matrix, connecting asymptotic symmetries with conformal field theory structures.

Findings

Virasoro symmetry acts on the conformal sphere at null infinity.

Tree-level S-matrix exhibits this Virasoro symmetry.

Links asymptotic symmetries with conformal structures in quantum gravity.

Abstract

It is shown that the tree-level S-matrix for quantum gravity in four-dimensional Minkowski space has a Virasoro symmetry which acts on the conformal sphere at null infinity.