246 citations · 1.3k across the 28 of their papers we have counts for
29 papers
Extended BMS representations and strings
Romain Ruzziconi, Peter West
We construct in detail the irreducible representations of the BMS group with super rotations in three and four dimensions that have the same rest frame momenta as the massive and m…
Celestial Symmetries and Subleading Phase Space of Null Hypersurfaces
Romain Ruzziconi, Céline Zwikel
Pursuing our analysis of [1], we study the gravitational solution space around a null hypersurface in the bulk of spacetime, such as a black hole or a cosmological horizon. We disc…
Celestial Symmetries of Black Hole Horizons
Romain Ruzziconi, Céline Zwikel
We establish a correspondence between the gravitational phase space at null infinity and the subleading phase space near a finite-distance null hypersurface, such as a black hole h…
Superrotations at Spacelike Infinity
Adrien Fiorucci, Javier Matulich, Romain Ruzziconi
We propose a consistent set of boundary conditions for gravity in asymptotically flat spacetime at spacelike infinity, which yields an enhancement of the Bondi-Metzner Sachs group…
One-loop partition function of gravity with leaky boundary conditions
Daniel Grumiller, Romain Ruzziconi, Céline Zwikel
Leaky boundary conditions in asymptotically AdS spacetimes are relevant to discuss black hole evaporation and the evolution of the Page curve via the island formula. We explore the…
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…
Symmetries and Charges in Weyl-Fefferman-Graham Gauge
Luca Ciambelli, Arnaud Delfante, Romain Ruzziconi +1
We investigate the asymptotic symmetries of three-dimensional AdS Einstein gravity in the Weyl-Fefferman-Graham gauge, which is a generalization of the Fefferman-Graham gauge induc…
Logarithmic Celestial Conformal Field Theory
Adrien Fiorucci, Daniel Grumiller, Romain Ruzziconi
We argue that the celestial conformal field theory exhibits patterns of a logarithmic conformal field theory. We uncover a Jordan block structure involving the celestial stress ten…
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…
Geometric action for extended Bondi-Metzner-Sachs group in four dimensions
Glenn Barnich, Kevin Nguyen, Romain Ruzziconi
The constrained Hamiltonian analysis of geometric actions is worked out before applying the construction to the extended Bondi-Metzner-Sachs group in four dimensions. For any Hamil…
Holographic Lorentz and Carroll Frames
Andrea Campoleoni, Luca Ciambelli, Arnaud Delfante +3
Relaxing the Bondi gauge, the solution space of three-dimensional gravity in the metric formulation has been shown to contain an additional free function that promotes the boundary…
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…
Minkowski and (A)dS ground states in general 2d dilaton gravity
Daniel Grumiller, Martin Laihartinger, Romain Ruzziconi
We reorganize the derivative expansion of general (power-counting non-renormalizable) 2d dilaton gravity such that the mass function is integrable. As an example, we consider a thr…
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…
Generalized dilaton gravity in 2d
Daniel Grumiller, Romain Ruzziconi, Céline Zwikel
Generalized dilaton gravity in 2d is the most general consistent deformation of the Jackiw-Teitelboim model that maintains local Lorentz invariance. The action is generically not p…
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…
Coadjoint representation of the BMS group on celestial Riemann surfaces
Glenn Barnich, Romain Ruzziconi
The coadjoint representation of the BMS group in four dimensions is constructed in a formulation that covers both the sphere and the punctured plane. The structure constants are wo…
Conservation and Integrability in Lower-Dimensional Gravity
Romain Ruzziconi, Céline Zwikel
We address the questions of conservation and integrability of the charges in two and three-dimensional gravity theories at infinity. The analysis is performed in a framework that a…
Charge Algebra in Al(A)dS Spacetimes
Adrien Fiorucci, Romain Ruzziconi
The gravitational charge algebra of generic asymptotically locally (A)dS spacetimes is derived in dimensions. The analysis is performed in the Starobinsky/Fefferman-Graham gaug…
Weyl Charges in Asymptotically Locally AdS Spacetimes
Francesco Alessio, Glenn Barnich, Luca Ciambelli +2
We discuss an enhancement of the Brown-Henneaux boundary conditions in three-dimensional AdS General Relativity to encompass Weyl transformations of the boundary metric. The result…
On the Various Extensions of the BMS Group
Romain Ruzziconi
The Bondi-Metzner-Sachs-van der Burg (BMS) group is the asymptotic symmetry group of radiating asymptotically flat spacetimes. It has recently received renewed interest in the cont…
Fefferman-Graham and Bondi Gauges in the Fluid/Gravity Correspondence
Luca Ciambelli, Charles Marteau, P. Marios Petropoulos +1
In three-dimensional gravity, we discuss the relation between the Fefferman--Graham gauge, the Bondi gauge and the Eddington--Finkelstein type of gauge, often referred to as the de…
Gauges in Three-Dimensional Gravity and Holographic Fluids
Luca Ciambelli, Charles Marteau, P. Marios Petropoulos +1
Solutions to Einstein's vacuum equations in three dimensions are locally maximally symmetric. They are distinguished by their global properties and their investigation often requir…
Conserved currents in the Palatini formulation of general relativity
Glenn Barnich, Pujian Mao, Romain Ruzziconi
We derive the expressions for the local, on-shell closed co-dimension 2 forms in the Palatini formulation of general relativity and explicitly show their on-shell equivalence to th…