281 citations · 1.9k across the 34 of their papers we have counts for
34 papers
Taming the Aretakis instability: extremal black holes with multi-degenerate horizons
Shreyansh Agrawal, Panagiotis Charalambous, Laura Donnay +2
Stationary black hole geometries with non-degenerate Cauchy horizons are classically unstable due to mass inflation. At extremality, mass inflation is absent, but a different dynam…
Infrared physics of QED and gravity from representation theory
Laura Donnay, Yannick Herfray
The infrared structure of QED and gravity is known to be governed by an infinite-dimensional symmetry group which extends the Poincaré group to include, respectively, large …
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…
Celestial algebra in Einstein-Yang-Mills theory
Shreyansh Agrawal, Panagiotis Charalambous, Laura Donnay
From a study of the subleading structure of the asymptotic equations of motion in Einstein-Yang-Mills theory, we construct charges that are conserved up to quadratic order in non-r…
Logarithmic doublets in CCFT
Agnese Bissi, Laura Donnay, Beniamino Valsesia
We investigate the presence of logarithmic CFT doublets in the soft sector of celestial CFT related with supertranslations. We show that the quantum operator associated with a $\lo…
Carrollian representation from twistor space
Laura Donnay, Laurent Freidel, Yannick Herfray
We construct an explicit realization of the action of the loop algebra on fields at null infinity. This action is directly derived by Penrose transform of the geome…
Celestial holography: An asymptotic symmetry perspective
Laura Donnay
We review the role that infinite-dimensional symmetries arising at the boundary of asymptotically flat spacetimes play in the context of the celestial holography program. Once reca…
Inferring fundamental spacetime symmetries with gravitational-wave memory: from LISA to the Einstein Telescope
Boris Goncharov, Laura Donnay, Jan Harms
We revisit gravitational wave (GW) memory as the key to measuring spacetime symmetries, extending beyond its traditional role in GW searches. In particular, we show how these symme…
Logarithmic soft graviton theorems from superrotation Ward identities
Shreyansh Agrawal, Laura Donnay, Kevin Nguyen +1
Soft graviton theorems receive one-loop contributions that are logarithmic in the energy of the soft graviton, and which are closely related to tails of gravitational waveforms. We…
Celestial open strings at one-loop
Laura Donnay, Gaston Giribet, Hernán González +2
We study celestial amplitudes in string theory at one-loop. Celestial amplitudes describe scattering processes of boost eigenstates and relate to amplitudes in the more standard ba…
-Forms on the Celestial Sphere
Laura Donnay, Erfan Esmaeili, Carlo Heissenberg
We construct a basis of conformal primary wavefunctions (CPWs) for -form fields in any dimension, calculating their scalar products and exhibiting the change of basis between co…
Bridging Carrollian and Celestial Holography
Laura Donnay, Adrien Fiorucci, Yannick Herfray +1
Gravity in asymptotically flat spacetime constitutes the archetypal example of a gravitational system with leaky boundary conditions. Pursuing our analysis of [1], we argue th…
Loop-corrected subleading soft theorem and the celestial stress-tensor
Laura Donnay, Kevin Nguyen, Romain Ruzziconi
We demonstrate that the one-loop exact subleading soft graviton theorem automatically follows from conservation of the BMS charges, provided that the hard and soft fluxes separatel…
Goldilocks Modes and the Three Scattering Bases
Laura Donnay, Sabrina Pasterski, Andrea Puhm
We consider massless scattering from the point of view of the position, momentum, and celestial bases. In these three languages different properties of physical processes become ma…
Carrollian Perspective on Celestial Holography
Laura Donnay, Adrien Fiorucci, Yannick Herfray +1
We show that a sourced conformal Carrollian field theory has the right kinematic properties to holographically describe gravity in asymptotically flat spacetime. The exte…
BMS Flux Algebra in Celestial Holography
Laura Donnay, Romain Ruzziconi
Starting from gravity in asymptotically flat spacetime, the BMS momentum fluxes are constructed. These are non-local expressions of the solution space living on the celestial Riema…
Quantum BMS transformations in conformally flat space-times and holography
Laura Donnay, Gaston Giribet, Felipe Rosso
We define and study asymptotic Killing and conformal Killing vectors in -dimensional Minkowski, (A)dS, and . We construct t…
Horizon symmetries and hairy black holes in AdS
Laura Donnay, Gaston Giribet, Julio Oliva
We investigate whether supertranslation symmetry may appear in a scenario that involves black holes in AdS space. The framework we consider is massive 3D gravity, which admits a ri…
Asymptotic Symmetries and Celestial CFT
Laura Donnay, Sabrina Pasterski, Andrea Puhm
We provide a unified treatment of conformally soft Goldstone modes which arise when spin-one or spin-two conformal primary wavefunctions become pure gauge for certain integer value…
Cosmological horizons, Noether charges and entropy
Laura Donnay, Gaston Giribet
It has recently been shown that, in the vicinity of their event horizons, black holes exhibit an infinite-dimensional symmetry. This symmetry captures relevant physical information…
Carrollian Physics at the Black Hole Horizon
Laura Donnay, Charles Marteau
We show that the geometry of a black hole horizon can be described as a Carrollian geometry emerging from an ultra-relativistic limit where the near-horizon radial coordinate plays…
Conformally Soft Photons and Gravitons
Laura Donnay, Andrea Puhm, Andrew Strominger
The four-dimensional -matrix is reconsidered as a correlator on the celestial sphere at null infinity. Asymptotic particle states can be characterized by the point at which they…