Numerical methods for finding stationary gravitational solutions

ÓJC Dias, JE Santos, B Way - Classical and Quantum Gravity, 2016 - iopscience.iop.org
The wide applications of higher dimensional gravity and gauge/gravity duality have fuelled
the search for new stationary solutions of the Einstein equation (possibly coupled to matter) …

Conserved currents for a Kerr black hole and orthogonality of quasinormal modes

SR Green, S Hollands, L Sberna, V Toomani… - Physical Review D, 2023 - APS
We introduce a bilinear form for Weyl scalar perturbations of Kerr. The form is symmetric and
conserved, and we show that, when combined with a suitable renormalization prescription …

Hydrodynamics of simply spinning black holes & hydrodynamics for spinning quantum fluids

M Garbiso, M Kaminski - Journal of High Energy Physics, 2020 - Springer
A bstract We find hydrodynamic behavior in large simply spinning five-dimensional Anti-de
Sitter black holes. These are dual to spinning quantum fluids through the AdS/CFT …

Grey Galaxies' as an endpoint of the Kerr-AdS superradiant instability

S Kim, S Kundu, E Lee, J Lee, S Minwalla… - Journal of High Energy …, 2023 - Springer
A bstract Kerr-AdS d+ 1 black holes for d≥ 3 suffer from classical superradiant instabilities
over a range of masses above extremality. We conjecture that these instabilities settle down …

Generalized black hole entropy is von Neumann entropy

J Kudler-Flam, S Leutheusser… - arXiv preprint arXiv …, 2023 - arxiv.org
It was recently shown that the von Neumann algebras of observables dressed to the mass of
a Schwarzschild-AdS black hole or an observer in de Sitter are Type II, and thus admit well …

Black hole superradiance in the presence of Lorentz symmetry violation

M Khodadi - Physical Review D, 2021 - APS
In this paper we consider the massive scalar perturbation on the top of a small spinning-like
black hole in context of Einstein-bumblebee modified gravity in order to probe the role of …

Einstein's Universe: Cosmological structure formation in numerical relativity

HJ Macpherson, DJ Price, PD Lasky - Physical Review D, 2019 - APS
We perform large-scale cosmological simulations that solve Einstein's equations directly via
numerical relativity. Starting with initial conditions sampled from the cosmic microwave …

Inhomogeneous cosmology with numerical relativity

HJ Macpherson, PD Lasky, DJ Price - Physical Review D, 2017 - APS
We perform three-dimensional numerical relativity simulations of homogeneous and
inhomogeneous expanding spacetimes, with a view toward quantifying nonlinear effects …

[HTML][HTML] Superradiance and stability of Kerr black hole enclosed by anisotropic fluid matter

M Khodadi, R Pourkhodabakhshi - Physics Letters B, 2021 - Elsevier
Focusing on the rotating black hole (BH) surrounded by the anisotropic fluid matters;
radiation, dust, and dark matter, we study the massive scalar superradiant scattering and the …

Hairy black holes in AdS with Robin boundary conditions

T Harada, T Ishii, T Katagiri, N Tanahashi - Journal of High Energy Physics, 2023 - Springer
A bstract We study hairy black holes in Einstein-Maxwell-complex scalar theory in four-
dimensional asymptotically global anti-de Sitter (AdS) spacetime when the Robin boundary …