279 citations · 2.5k across the 99 of their papers we have counts for
57 papers · 1 filter
Spontaneous Symmetry Breaking To GR in SO(4,2) Gravitational Yang-Mills Theory
Jack Gegenberg, Gabor Kunstatter
We consider a Yang-Mills type gauge theory of gravity based on the conformal group SO(4,2) coupled to a conformally invariant real scalar field. The goal is to generate fundamental…
Effect of dark matter on galactic black hole ringdown waveforms and shadows
Ramin G. Daghigh, Gabor Kunstatter
We calculate the effect of dark matter on the ringdown waveform and shadow of supermassive black holes at the core of galaxies. Our main focus is on the supermassive black hole at…
Scalar Perturbations and Stability of a Loop Quantum Corrected Kruskal Black Hole
Ramin G. Daghigh, Michael D. Green, Gabor Kunstatter
We investigate the massless scalar field perturbations of a new loop quantum gravity motivated regular black hole proposed by Ashtekar {\it et al.} in [Phys.Rev.Lett. 121, 241301 (…
Scalar Perturbations of a Single-Horizon Regular Black Hole
Ramin G. Daghigh, Michael D. Green, Jodin C. Morey +1
We investigate the massless scalar field perturbations, including the quasinormal mode spectrum and the ringdown waveform, of a regular black hole spacetime that was derived via th…
Quantum Mechanics of the Interior of the Russo-Susskind-Thorlacius Black Hole
Ramin G. Daghigh, Michael D. Green, Gabor Kunstatter
We study the quantum mechanics of homogeneous black hole interiors in the RST model of 2D gravity. The model, which contains a dilaton and metric, includes radiation back-reaction…
Smooth and sharp creation of a spherical shell for a -dimensional quantum field
Margaret E. Carrington, Gabor Kunstatter, Jorma Louko +1
We study the creation of a spherical, finite radius source for a quantized massless scalar field in 3+1 dimensions. The goal is to model the breakdown of correlations that has been…
Exact time-dependent states for throat quantized toroidal AdS black holes
Hideki Maeda, Gabor Kunstatter
We investigate exact non-stationary quantum states of vacuum toroidal black holes with a negative cosmological constant in arbitrary dimensions using the framework of throat quanti…
Polymer Quantization of a Self-Gravitating Thin Shell
Jonathan Ziprick, Jack Gegenberg, Gabor Kunstatter
We study the quantum mechanics of self-gravitating thin shell collapse by solving the polymerized Wheeler-DeWitt equation. We obtain the energy spectrum and solve the time dependen…
The central role of symmetry in physics
Saurya Das, Gabor Kunstatter
Spacetime and internal symmetries can be used to severely restrict the form of the equations for the fundamental laws of physics. The success of this approach in the context of gen…
Designer black holes from new 2D gravity
Gabor Kunstatter, Hideki Maeda, Tim Taves
We present a family of extensions of spherically symmetric Einstein-Lanczos-Lovelock gravity. The field equations are second order and obey a generalized Birkhoff's theorem. The Ha…
New 2D dilaton gravity for nonsingular black holes
Gabor Kunstatter, Hideki Maeda, Tim Taves
We construct a two-dimensional action that is an extension of spherically symmetric Einstein-Lanczos-Lovelock gravity. The action contains arbitrary functions of the areal radius a…
Two Dimensional Gravity as a modified Yang-Mills Theory
Jack Gegenberg, Gabor Kunstatter
We study a deSitter/Anti-deSitter/Poincare Yang-Mills theory of gravity in d-space-time dimensions in an attempt to retain the best features of both general relativity and Yang-Mil…
Modelling the Evaporation of Non-singular Black Holes
Tim Taves, Gabor Kunstatter
We present a model for studying the formation and evaporation of non-singular (quantum corrected) black holes. The model is based on a generalized form of the dimensionally reduced…
Throat quantization of the Schwarzschild-Tangherlini(-AdS) Black Hole
Gabor Kunstatter, Hideki Maeda
Adopting the throat quantization pioneered by Louko and Mäkelä, we derive the mass and area spectra for the Schwarzschild-Tangherlini black hole and its anti-de~Sitter (AdS) genera…
Hamiltonian dynamics of Lovelock black holes with spherical symmetry
Gabor Kunstatter, Hideki Maeda, Tim Taves
We consider spherically symmetric black holes in generic Lovelock gravity. Using geometrodynamical variables we do a complete Hamiltonian analysis, including derivation of the supe…
Geometrodynamics of spherically symmetric Lovelock gravity
Gabor Kunstatter, Tim Taves, Hideki Maeda
We derive the Hamiltonian for spherically symmetric Lovelock gravity using the geometrodynamics approach pioneered by Kuchař in the context of four-dimensional general relativity.…
Boundary conditions in quantum mechanics on the discretized half-line
Gabor Kunstatter, Jorma Louko
We investigate nonrelativistic quantum mechanics on the discretized half-line, constructing a one-parameter family of Hamiltonians that are analogous to the Robin family of boundar…
Quantum Mechanics of the Interior of Radiating 2-D Black Holes
Jack Gegenberg, Gabor Kunstatter, Timothy Taves
We study the homogeneous sector of the RST model describing the gravitational dynamics, including back-reaction, of radiating 2-d black holes. We find the exact solutions both in c…
Hamiltonian Formulation of Scalar Field Collapse in Einstein Gauss Bonnet Gravity
T. Taves, C. D. Leonard, G. Kunstatter +1
We compute the Hamiltonian for spherically symmetric scalar field collapse in Einstein-Gauss-Bonnet gravity in D dimensions using slicings that are regular across future horizons.…
Highly Damped Quasinormal Modes and the Small Scale Structure of Quantum Corrected Black Hole Exteriors
James Babb, Ramin G. Daghigh, Gabor Kunstatter
Quasinormal modes provide valuable information about the structure of spacetime outside a black hole. There is also a conjectured relationship between the highly damped quasinormal…
Gravitational collapse of K-essence Matter in Painlevé-Gullstrand coordinates
C. Danielle Leonard, Jonathan Ziprick, Gabor Kunstatter +1
We conduct numerical simulations in Painlevé-Gullstrand coordinates of a variety of K-essence-type scalar fields under spherically symmetric gravitational collapse. We write down g…
Higher Dimensional Choptuik Scaling in Painleve Gullstrand Coordinates
Tim Taves, Gabor Kunstatter
We investigate Choptuik scaling in the spherically symmetric collapse of a massless scalar field in higher dimensions using Painleve-Gullstrand (P-G) coordinates. Our analysis conf…
Dynamical Surface Gravity in Spherically Symmetric Black Hole Formation
Mathias Pielahn, Gabor Kunstatter, Alex B. Nielsen
We study dynamical surface gravity in a general spherically symmetric setting using Painlevé-Gullstrand (PG) coordinates. Our analysis includes several definitions that have been p…
Quantum dynamics of the Einstein-Rosen wormhole throat
Gabor Kunstatter, Jorma Louko, Ari Peltola
We consider the polymer quantization of the Einstein wormhole throat theory for an eternal Schwarzschild black hole. We numerically solve the difference equation describing the qua…