281 citations · 1.9k across the 34 of their papers we have counts for
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Generalized Couch--Torrence inversions
Panagiotis Charalambous, Laura Donnay, Alexandru Lupsasca
The Laplace equation on Euclidean flat space admits a discrete radial inversion symmetry. In 1983, Couch and Torrence (CT) found -- surprisingly -- that the massless wave equation…
Null infinity as an inverted extremal horizon: Matching an infinite set of conserved quantities for gravitational perturbations
Shreyansh Agrawal, Panagiotis Charalambous, Laura Donnay
Every spacetime that is asymptotically flat near null infinity can be conformally mapped via a spatial inversion onto the geometry around an extremal, non-rotating and non-expandin…
MHV leaf amplitudes from parafermions
Laura Donnay, Gaston Giribet, Beniamino Valsesia
We give a dual CFT representation of MHV leaf amplitudes in the large and semiclassical limit in terms of non-compact parafermions and a single affine Kac-Moody current for $SO…