Schwarzian transformations at null infinity
High Energy Physics - Theory
2022-11-28 v2 General Relativity and Quantum Cosmology
Abstract
I describe the Schwarzian behavior of the gravitational field at null infinity under superrotations, to be understood as an \textit{unobservable} gauge artifact. To this end I review the induced geometry of null infinity and the construction of the gauge-invariant News tensor that characterizes gravitational radiation. I discuss potentially important implications for the celestial holography program, suggesting in particular that the uplift of the AdS/CFT correspondence directly relates to the unobservable gauge sector.
Cite
@article{arxiv.2201.09640,
title = {Schwarzian transformations at null infinity},
author = {Kevin Nguyen},
journal= {arXiv preprint arXiv:2201.09640},
year = {2022}
}
Comments
17 pages + appendix