5 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 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…
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…
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…
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…