189 citations · 755 across the 16 of their papers we have counts for
16 papers
Testing gravitational waveforms in full General Relativity
Fabio D'Ambrosio, Francesco Gozzini, Lavinia Heisenberg +3
We perform a comprehensive analysis of state-of-the-art waveform models, focusing on their predictions concerning kick velocity and inferred gravitational wave memory. In our inves…
Hamiltonian Analysis of Gravity and the Failure of the Dirac-Bergmann Algorithm for Teleparallel Theories of Gravity
Fabio D'Ambrosio, Lavinia Heisenberg, Stefan Zentarra
In recent years, gravity has enjoyed considerable attention in the literature and important results have been obtained. However, the question of how many physical degrees of…
Geometry Transition in Spinfoams
Marios Christodoulou, Fabio D'Ambrosio, Charalampos Theofilis
We show how the fixed-spin asymptotics of the EPRL model can be used to perform the spin-sum for spin foam amplitudes defined on fixed two-complexes without interior faces and cont…
Gravitational Waves in Full, Non-Linear General Relativity
Fabio D'Ambrosio, Shaun D. B. Fell, Lavinia Heisenberg +3
These notes provide a student-friendly introduction to the theory of gravitational waves in full, non-linear general relativity (GR). We aim for a balance between physical intuitio…
Revisiting Cosmologies in Teleparallelism
Fabio D'Ambrosio, Lavinia Heisenberg, Simon Kuhn
We discuss the most general field equations for cosmological spacetimes for theories of gravity based on non-linear extensions of the non-metricity scalar and the torsion scalar. O…
Black holes in Gravity
Fabio D'Ambrosio, Shaun D. B. Fell, Lavinia Heisenberg +1
We systematically study the field equations of gravity for spherically symmetric and stationary metric-affine spacetimes. Such spacetimes are described by a metric a…
The End of a Black Hole's Evaporation -- Part I
Fabio D'Ambrosio, Marios Christodoulou, Pierre Martin-Dussaud +2
At the end of Hawking evaporation, the horizon of a black hole enters a physical region where quantum gravity cannot be neglected. The physics of this region has not been much expl…
ADM formulation and Hamiltonian analysis of Coincident General Relativity
Fabio D'Ambrosio, Mudit Garg, Lavinia Heisenberg +1
We consider a simpler geometrical formulation of General Relativity based on non-metricity, known as Coincident General Relativity. We study the ADM formulation of the theory and p…
Classification of Primary Constraints of Quadratic Non-Metricity Theories of Gravity
Fabio D'Ambrosio, Lavinia Heisenberg
We perform the ADM decomposition of a five-parameter family of quadratic non-metricity theories and study their conjugate momenta. After systematically identifying all possible con…
Non-linear extension of non-metricity scalar for MOND
Fabio D'Ambrosio, Mudit Garg, Lavinia Heisenberg
General Relativity enjoys the freedom of different geometrical interpretations in terms of curvature, torsion or non-metricity. Within this geometrical trinity, a simpler geometric…
Semi-Classical Holomorphic Transition Amplitudes in Covariant Loop Quantum Gravity
Fabio D'Ambrosio
Covariant Loop Quantum Gravity (CLQG) is a tentative background-independent and non-perturbative theory of quantum gravity which has emerged from a number of different research dir…
A Noether Theorem for discrete Covariant Mechanics
Fabio D'Ambrosio
Noether's theorem is an elegant and powerful tool of classical mechanics, but it is of little to no consequence in discrete theories. Here we define and explore a discrete approach…
White Holes as Remnants: A Surprising Scenario for the End of a Black Hole
Eugenio Bianchi, Marios Christodoulou, Fabio D'Ambrosio +2
Quantum tunneling of a black hole into a white hole provides a model for the full life cycle of a black hole. The white hole acts as a long-lived remnant, solving the black-hole in…
How Information Crosses Schwarzschild's Central Singularity
Fabio D'Ambrosio, Carlo Rovelli
We study the natural extension of spacetime across Schwarzschild's central singularity and the behavior of the geodesics crossing it. Locality implies that this extension is indepe…
Characteristic Time Scales for the Geometry Transition of a Black Hole to a White Hole from Spinfoams
Marios Christodoulou, Fabio D'Ambrosio
Quantum fluctuations of the metric provide a decay mechanism for black holes, through a transition to a white hole geometry. Old perplexing results by Ambrus and Hájíček and more r…
Hypersurface-deformation algebroids and effective space-time models
Martin Bojowald, Suddhasattwa Brahma, Umut Buyukcam +1
In canonical gravity, covariance is implemented by brackets of hypersurface-deformation generators forming a Lie algebroid. Lie algebroid morphisms therefore allow one to relate di…