PoS - Proceedings of Science
Volume 406 - Corfu Summer Institute 2021 "School and Workshops on Elementary Particle Physics and Gravity" (CORFU2021) - Workshop on Celestial Amplitudes and Flat Space Holography
Schwarzian transformations at null infinity
K. Nguyen
Full text: pdf
Published on: November 23, 2022
Abstract
I describe the Schwarzian behavior of the gravitational field at null infinity, to be understood as an 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$_3$/CFT$_2$ correspondence directly relates to the unobservable gauge sector.
DOI: https://doi.org/10.22323/1.406.0133
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