156 citations · 634 across the 18 of their papers we have counts for
20 papers
(Anti)-de Sitter with leaky boundaries and corners
Robert McNees, Céline Zwikel
We construct charges for four-dimensional spacetimes with a non-vanishing cosmological constant, including charges that are not conserved because of a leaky boundary and charges as…
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…
The symplectic potential for leaky boundaries
Robert McNees, Céline Zwikel
Charges associated with gauge symmetries are defined on boundaries of spacetimes. But these constructions typically involve divergent quantities when considering asymptotic boundar…
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…
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…
Finite Charges from the Bulk Action
Robert McNees, Céline Zwikel
Constructing charges in the covariant phase space formalism often leads to formally divergent expressions, even when the fields satisfy physically acceptable fall-off conditions. T…
Null boundary phase space: slicings, news and memory
H. Adami, D. Grumiller, M. M. Sheikh-Jabbari +3
We construct the boundary phase space in -dimensional Einstein gravity with a generic given co-dimension one null surface as the boundary. The associated boundary sym…
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…
Chiral Massive News: Null Boundary Symmetries in Topologically Massive Gravity
H. Adami, M. M. Sheikh-Jabbari, V. Taghiloo +2
We study surface charges on a generic null boundary in three dimensional topological massive gravity (TMG). We construct the solution phase space which involves four independent fu…
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…
Symmetries at Null Boundaries: Two and Three Dimensional Gravity Cases
H. Adami, M. M. Sheikh-Jabbari, V. Taghiloo +2
We carry out in full generality and without fixing specific boundary conditions, the symmetry and charge analysis near a generic null surface for two and three dimensional (2d and…
Horizons 2020
D. Grumiller, M. M. Sheikh-Jabbari, C. Zwikel
Horizons of black holes or cosmologies are peculiar loci of spacetime where interesting physical effects takes place, some of which are probed by recent (EHT and LIGO) and future e…
T-Witts from the horizon
H. Adami, D. Grumiller, S. Sadeghian +2
Expanding around null hypersurfaces, such as generic Kerr black hole horizons, using co-rotating Kruskal-Israel-like coordinates we study the associated surface charges, their symm…
Spacetime structure near generic horizons and soft hair
Daniel Grumiller, Alfredo Pérez, M. M. Sheikh-Jabbari +2
We explore the spacetime structure near non-extremal horizons in any spacetime dimension greater than two and discover a wealth of novel results: 1. Different boundary conditions a…
Asymptotic Symmetries of Three-Dimensional Black Strings
Stéphane Detournay, P. Marios Petropoulos, Céline Zwikel
We determine a consistent phase space for a theory consisting in the Einstein-Hilbert action coupled to matter fields (dilaton, one-form, two-form) and containing three-dimensional…
Canonical Charges in Flatland
Max Riegler, Céline Zwikel
In this series of lectures we give an introduction to the concept of asymptotic symmetry analysis with a focus on asymptotically flat spacetimes in 2+1 dimensions. We explain gener…
BTZ Black Holes and Flat Space Cosmologies in Higher Derivative Theories
Céline Zwikel
We consider BTZ black holes and flat space cosmologies in generic higher derivative gravity theories in 2+1 dimensions. Our goal is to prove the match between the bulk Iyer-Wald en…
Warped AdS_3 Black Holes in Higher Derivative Gravity Theories
Stéphane Detournay, Laure-Anne Douxchamps, Gim Seng Ng +1
We consider warped AdS_3 black holes in generic higher derivatives gravity theories in 2+1 dimensions. The asymptotic symmetry group of the phase space containing these black holes…
Phase Transitions in Warped AdS Gravity
Stéphane Detournay, Céline Zwikel
We consider asymptotically Warped AdS black holes in Topologically Massive Gravity. We study their thermodynamic stability and show the existence of a Hawking-Page phase transi…