742 citations · 5.6k across the 82 of their papers we have counts for
48 papers · 1 filter
Gravitational multipoles, antipodal matching relations, and the logarithmic soft graviton theorem
Geoffrey Compère, Dima Fontaine, Wen-Bin Liu +1
We derive the classical logarithmic soft graviton theorem for the scattering of massive particles in four-dimensional asymptotically flat spacetime using a position-space analysis…
A proof of conservation laws in gravitational scattering: tails and breaking of peeling
Geoffrey Compère, Sébastien Robert
We propose a definition of asymptotically flat spacetimes that is consistent with both null infinities and compatible with known properties of gravitational scattering, incoming an…
Electromagnetic multipole expansions and the logarithmic soft photon theorem
Geoffrey Compère, Dima Fontaine, Kevin Nguyen
We study the general structure of the electromagnetic field in the vicinity of spatial infinity. Starting from the general solution of the sourced Maxwell equations written in term…
Metric reconstruction from celestial multipoles
Geoffrey Compère, Roberto Oliveri, Ali Seraj
The most general vacuum solution to Einstein's field equations with no incoming radiation can be constructed perturbatively from two infinite sets of canonical multipole moments, w…
Celestial Holography: Lectures on Asymptotic Symmetries
P. B. Aneesh, Geoffrey Compère, Leonardo Pipolo de Gioia +2
The aim of these Lectures is to provide a brief overview of the subject of asymptotic symmetries of gauge and gravity theories in asymptotically flat spacetimes as background mater…
The -BMS Charge Algebra
Geoffrey Compère, Adrien Fiorucci, Romain Ruzziconi
The surface charge algebra of generic asymptotically locally (A)dS spacetimes without matter is derived without assuming any boundary conditions. Surface charges associated wit…
Invariance of Unruh and Hawking radiation under matter-induced supertranslations
Geoffrey Compère, Jiang Long, Max Riegler
Matter fields are supertranslated upon crossing a shock wave, which leads to entanglement of the quantum vacuum between the two regions on either side of the shock wave. We probe t…
Superboost transitions, refraction memory and super-Lorentz charge algebra
Geoffrey Compère, Adrien Fiorucci, Romain Ruzziconi
We derive a closed-form expression of the orbit of Minkowski spacetime under arbitrary Diff super-Lorentz transformations and supertranslations. Such vacua are labelled by t…
Advanced Lectures on General Relativity
Geoffrey Compère, Adrien Fiorucci
These lecture notes are intended for starting PhD students in theoretical physics who have a working knowledge of General Relativity. The 4 topics covered are (1) Surface charges a…
Gravitational multipole moments from Noether charges
G. Compère, R. Oliveri, A. Seraj
We define the mass and current multipole moments for an arbitrary theory of gravity in terms of canonical Noether charges associated with specific residual transformations in canon…
Asymptotically flat spacetimes with BMS symmetry
Geoffrey Compère, Adrien Fiorucci
We construct the phase space of 3-dimensional asymptotically flat spacetimes that forms the bulk metric representation of the BMS group consisting of both supertranslations and sup…
Bulk supertranslation memories: a concept reshaping the vacua and black holes of general relativity
Geoffrey Compère
The memory effect is a prediction of general relativity on the same footing as the existence of gravitational waves. The memory effect is understood at future null infinity as a tr…
Vacua of the gravitational field
Geoffrey Compère, Jiang Long
The Poincaré invariant vacuum is not unique in quantum gravity. The BMS supertranslation symmetry originally defined at null infinity is spontaneously broken and results in inequiv…
Symplectic and Killing Symmetries of AdS Gravity: Holographic vs Boundary Gravitons
G. Compère, P. Mao, A. Seraj +1
The set of solutions to the AdS Einstein gravity with Brown-Henneaux boundary conditions is known to be a family of metrics labeled by two arbitrary periodic functions, respect…
invariant non-extremal entropy
G. Compère, V. Lekeu
The entropy of generic non-extremal dyonic black holes in the STU model has been shown to admit a remarkably universal form. The missing invariant in the formula was recently ident…
Near-horizon Extreme Kerr Magnetospheres
G. Compère, R. Oliveri
Analytical solutions to force-free electrodynamics around black holes are fundamental for building simple models of accretion disk and jet dynamics. We present a (nonexhaustive) cl…
Wiggling Throat of Extremal Black Holes
G. Compère, K. Hajian, A. Seraj +1
We construct the classical phase space of geometries in the near-horizon region of vacuum extremal black holes as announced in [arXiv:1503.07861]. Motivated by the uniqueness theor…
Extremal Rotating Black Holes in the Near-Horizon Limit: Phase Space and Symmetry Algebra
G. Compère, K. Hajian, A. Seraj +1
We construct the NHEG phase space, the classical phase space of Near-Horizon Extremal Geometries with fixed angular momenta and entropy, and with the largest symmetry algebra. We f…
Liouville theory beyond the cosmological horizon
Geoffrey Compère, Laura Donnay, Pierre-Henry Lambert +1
The dS/CFT correspondence postulates the existence of a Euclidean CFT dual to a suitable gravity theory with Dirichlet boundary conditions asymptotic to de Sitter spacetime. A semi…
Two Virasoro symmetries in stringy warped AdS
Geoffrey Compère, Monica Guica, Maria J. Rodriguez
We study three-dimensional consistent truncations of type IIB supergravity which admit warped AdS solutions. These theories contain subsectors that have no bulk dynamics. We sh…
Black holes in N=8 supergravity from SO(4,4) hidden symmetries
David D. K. Chow, Geoffrey Compère
We detail the construction of the most general asymptotically flat, stationary, rotating, non-extremal, dyonic black hole of the four-dimensional N=2 supergravity coupled to 3 vect…
Dyonic AdS black holes in maximal gauged supergravity
David D. K. Chow, Geoffrey Compère
We present two new classes of dyonic anti-de Sitter black hole solutions of 4-dimensional maximal N=8, SO(8) gauged supergravity. They are: (1) static black holes of N=2, U(1)^4 ga…
Seed for general rotating non-extremal black holes of N=8 supergravity
David D. K. Chow, Geoffrey Compère
We describe the most general asymptotically flat, stationary, non-extremal, dyonic black hole of the four-dimensional N = 2 supergravity coupled to 3 vector multiplets that describ…
Observables and Microscopic Entropy of Higher Spin Black Holes
Geoffrey Compère, Juan I. Jottar, Wei Song
In the context of recently proposed holographic dualities between higher spin theories in AdS3 and 1+1-dimensional CFTs with W-symmetry algebras, we revisit the definition of highe…