Schwarzian transformations at null infinity

2022/01/24 by Nguyen, Kevin · 3 citations
#FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #High Energy Physics - Theory (hep-th)

paper · doi:10.48550/arxiv.2201.09640

Abstract

I describe the Schwarzian behavior of the gravitational field at null infinity under superrotations, 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 AdS₃/CFT₂ correspondence directly relates to the unobservable gauge sector.

Cited by

• Lectures on Carrollian Holography
• Null infinity as an inverted extremal horizon: Matching an infinite set of conserved quantities for gravitational perturbations
• Boundary Energy-Momentum Tensors for Asymptotically Flat Spacetimes

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