Quasinormal modes of Schwarzschild black holes in projective invariant Chern-Simons modified gravity

S Boudet, F Bombacigno, GJ Olmo… - Journal of Cosmology …, 2022 - iopscience.iop.org
Abstract We generalize the Chern-Simons modified gravity to the metric-affine case and
impose projective invariance by supplementing the Pontryagin density with homothetic …

Cosmological hyperfluids, torsion and non-metricity

D Iosifidis - The European Physical Journal C, 2020 - Springer
We develop a novel model for cosmological hyperfluids, that is fluids with intrinsic
hypermomentum that induce spacetime torsion and non-metricity. Imposing the …

Torsional birefringence in metric-affine Chern-Simons gravity: gravitational waves in late-time cosmology

S Boudet, F Bombacigno, F Moretti… - Journal of Cosmology …, 2023 - iopscience.iop.org
In the context of the metric-affine Chern-Simons gravity endowed with projective invariance,
we derive analytical solutions for torsion and nonmetricity in the homogeneous and isotropic …

Most general theory of 3d gravity: Covariant phase space, dual diffeomorphisms, and more

M Geiller, C Goeller, N Merino - Journal of High Energy Physics, 2021 - Springer
A bstract We show that the phase space of three-dimensional gravity contains two layers of
dualities: between diffeomorphisms and a notion of “dual diffeomorphisms” on the one hand …

Cosmological topologically massive gravitons and photons

S Carlip, S Deser, A Waldron… - Classical and Quantum …, 2009 - iopscience.iop.org
Abstract We study topologically massive (2+ 1)-dimensional gravity with a negative
cosmological constant. The masses of the linearized curvature excitations about AdS 3 …

Metric-affine gravity and cosmology/aspects of torsion and non-metricity in gravity theories

D Iosifidis - arxiv preprint arxiv:1902.09643, 2019 - arxiv.org
This Thesis is devoted to the study of Metric-Affine Theories of Gravity and Applications to
Cosmology. The thesis is organized as follows. In the first Chapter we define the various …

Supersymmetric States in Anti–de Sitter Supergravity with Chiral Torsion

L Andrianopoli, R Noris, M Trigiante, J Zanelli - Physical Review Letters, 2024 - APS
In this Letter, we construct a supersymmetric model, obtained by deforming N= 2 anti–de
Sitter D= 3 supergravity through a chiral vector component of the torsion. Moreover, we study …

Limits of three-dimensional gravity and metric kinematical Lie algebras in any dimension

J Matulich, S Prohazka, J Salzer - Journal of High Energy Physics, 2019 - Springer
A bstract We extend a recent classification of three-dimensional spatially isotropic
homogeneous spacetimes to Chern-Simons theories as three-dimensional gravity theories …

Einstein manifolds with torsion and nonmetricity

DS Klemm, L Ravera - Physical Review D, 2020 - APS
Manifolds endowed with torsion and nonmetricity are interesting both from the physical and
the mathematical points of view. In this paper, we generalize some results presented in the …

Three-dimensional supergravity reloaded

A Giacomini, R Troncoso… - Classical and Quantum …, 2007 - iopscience.iop.org
The locally supersymmetric extension of the most general gravity theory in three dimensions
leading to first-order field equations for the vielbein and the spin connection is constructed …