828 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Dalhousie UniversityCA33 papers
- Sapienza University of RomeIT30 papers
- Massachusetts Institute of TechnologyUS21 papers
- McGill UniversityCA21 papers
- Princeton UniversityUS21 papers
- University of Maryland, College ParkUS21 papers
- Budker Institute of Nuclear PhysicsRU20 papers
- Centre National de la Recherche ScientifiqueFR20 papers
- Institute of Particle PhysicsCA20 papers
- Institut National de Physique Nucléaire et de Physique des ParticulesFR20 papers
- Iowa State UniversityUS20 papers
- Istituto Nazionale di Fisica Nucleare, Sezione di NapoliIT20 papers
31 papers · 1 filter
The general set of Noetherian energy-momentum tensors in linearized gravity: mathematical framework
Lydia Beth Taylor, Mark Robert Baker
Energy-momentum tensors are foundational objects which are uniquely defined in standard physical field theories such as electrodynamics and Yang-Mills theory. In general relativity…
On black holes in new general relativity
D. F. López, A. A. Coley, R. J. van den Hoogen
New General Relativity (NGR) is a class of teleparallel theories defined by three free parameters, effectively reduced to two after appropriate normalization, which are subject to…
Teleparallel Geometry with Spherical Symmetry: The diagonal and proper frames
Robert J. van den Hoogen, Hudson X. Forance
We present the proper co-frame and its corresponding (diagonal) co-frame/spin connection pair for spherically symmetric geometries which can be used as an initial ansatz in any the…
Spherically symmetric teleparallel geometries
A. A. Coley, A. Landry, R. J. van den Hoogen +1
We are interested in the development of spherically symmetric geometries in teleparallel gravity which are of physical importance. We first express the general forms for the…
Locally-homogeneous Riemann-Cartan geometries with the largest symmetry group
D. D. McNutt, R. J. van den Hoogen, A. A. Coley
The symmetry frame formalism is an effective tool for computing the symmetries of a Riemann-Cartan geometry and, in particular, in metric teleparallel geometries. In the case of no…
Symmetries in Riemann-Cartan Geometries
David D. McNutt, Alan A. Coley, Robert J. van den Hoogen
Riemann-Cartan geometries are geometries that admit non-zero curvature and torsion tensors. These geometries have been investigated as geometric frameworks for potential theories i…
Bianchi Type Cosmological Models in Tele-parallel Gravity
R. J. van den Hoogen, A. A. Coley, D. D. McNutt
Symmetry assumptions on the geometrical framework have provided successful mechanisms to develop physically meaningful solutions to many problems. In tele-parallel gravity, invaria…
Generalized Teleparallel de Sitter geometries
Alan A. Coley, Alexandre Landry, Robert J. van den Hoogen +1
Theories of gravity based on teleparallel geometries are characterized by the torsion, which is a function of the coframe, derivatives of the coframe, and a zero curvature and metr…
Spatially Homogeneous Teleparallel Gravity: Bianchi I
A. A. Coley, R. J. van den Hoogen
Using a recently developed algorithm that chooses preferred coordinates and a preferred co-frame, we will determine the completely general Bianchi type I teleparallel geometry. In…
Teleparallel Minkowski Spacetime with Perturbative Approach for Teleparallel Gravity on a Proper Frame
Alexandre Landry, Robert J. van den Hoogen
A complete perturbation theory suitable for teleparallel gravity is developed. The proposed perturbation scheme takes into account perturbations of the coframe, the metric, and the…
A frame based approach to computing symmetries with non-trivial isotropy groups
D. D. McNutt, A. A. Coley, R. J. van den Hoogen
A frame approach to determining the most general solution admitting a desired symmetry group has been examined previously in Riemannian and teleparallel geometries with some succes…
Teleparallel Geometry with a Single Affine Symmetry
Alan Coley, Robert van den Hoogen
In teleparallel geometries, symmetries are represented by affine frame symmetries which constrain both the (co)frame basis and the spin-connection (which are the primary geometric…
Symmetric Teleparallel Geometries
A. A. Coley, R. J. van den Hoogen, D. D. McNutt
In teleparallel gravity and, in particular, in teleparallel gravity, there is a challenge in determining an appropriate (co-)frame and its corresponding spin connection to d…
Teleparallel geometries not characterized by their scalar polynomial torsion invariants
D. D. McNutt, A. A. Coley, R. J. van den Hoogen
A teleparallel geometry is an n-dimensional manifold equipped with a frame basis and an independent spin connection. For such a geometry, the curvature tensor vanishes and the tors…
Kantowski-Sachs Einstein-Aether Scalar Field Cosmological Models: The Sequel
S. Mohandas, R. J. van den Hoogen, D. Winters +1
Utilizing the autonomous system of ordinary differential equations derived in arXiv:1809.01458 to define the evolution, we further investigate a class of cosmological models within…
Symmetry and Equivalence in Teleparallel Gravity
A. A. Coley, R. J. van den Hoogen, D. D. McNutt
In theories such as teleparallel gravity and its extensions, the frame basis replaces the metric tensor as the primary object of study. A choice of coordinate system, frame basis a…
Teleparallel Theories of Gravity: Illuminating a Fully Invariant Approach
M. Krssak, R. J. van den Hoogen, J. G. Pereira +2
Teleparallel gravity and its popular generalization gravity can be formulated as fully invariant (under both coordinate transformations and local Lorentz transformations) th…
Kantowski-Sachs Einstein-Aether Scalar Field Cosmological Models
R. J. van den Hoogen, A. A. Coley, B. Alhulaimi +3
A class of positive curvature spatially homogeneous but anisotropic cosmological models within an Einstein-aether gravitational framework are investigated. The matter source is ass…
Spatially Homogeneous Einstein-Aether Cosmological Models: Scalar Fields with a Generalized Harmonic Potential
B. Alhulaimi, R. J. van den Hoogen, A. A. Coley
Inflationary spatially homogeneous cosmological models within an Einstein-Aether gravitational framework are investigated. The matter source is assumed to be a scalar field which i…
Averaging geometrical objects on a differentiable manifold
Johan Brannlund, Robert van den Hoogen, Alan Coley
We construct a framework within which a mathematically precise, fully covariant, and exact averaging procedure for tensor fields on a manifold can be formulated. In particular, we…
A Complete Cosmological Solution to the Averaged Einstein Field Equations as found in Macroscopic Gravity
R. J. van den Hoogen
A formalism for analyzing the complete set of field equations describing Macroscopic Gravity is presented. Using this formalism, a cosmological solution to the Macroscopic Gravity…
Spherically Symmetric Solutions in Macroscopic Gravity
R. J. van den Hoogen
Schwarzschild's solution to the Einstein Field Equations was one of the first and most important solutions that lead to the understanding and important experimental tests of Einste…
Fermi-Frenet coordinates for space-like curves
Michael S. Underwood, Karl-Peter Marzlin
We generalize Fermi coordinates, which correspond to an adapted set of coordinates describing the vicinity of an observer's worldline, to the worldsheet of an arbitrary spatial cur…
Late-time behaviour of the tilted Bianchi type VIh models
S Hervik, R J van den Hoogen, W C Lim +1
We study tilted perfect fluid cosmological models with a constant equation of state parameter in spatially homogeneous models of Bianchi type VI_h using dynamical systems methods a…