211 citations · 847 across the 43 of their papers we have counts for
45 papers
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…
Gravitational wave defocussing in quadratic gravity
Jack Gegenberg, Sanjeev S. Seahra
We demonstrate that Huygens' principle for gravitational waves fails in quadratic gravity models that exhibit conformal symmetry at high energies. This results in the blurring of g…
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…
A big bounce, slow-roll inflation and dark energy from conformal gravity
Jack Gegenberg, Shohreh Rahmati, Sanjeev S. Seahra
We examine the cosmological sector of a gauge theory of gravity based on the SO(4,2) conformal group of Minkowski space. We allow for conventional matter coupled to the spacetime m…
Discrete Hamiltonian for General Relativity
Jonathan Ziprick, Jack Gegenberg
Beginning from the Ashtekar formulation of canonical general relativity, we derive a physical Hamiltonian written in terms of (classical) loop gravity variables. This is done by ga…
Infrared modification of gravity from conformal symmetry
Jack Gegenberg, Shohreh Rahmati, Sanjeev S. Seahra
We reconsider a gauge theory of gravity in which the gauge group is the conformal group SO(4,2) and the action is of the Yang-Mills form, quadratic in the curvature. The resulting…