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Teleparallel Theories of Gravity: Illuminating a Fully Invariant Approach

- M. Krššák, R. Hoogen, J. G. Pereira, C. Boehmer, A. Coley
- Physics
- 30 October 2018

Teleparallel gravity and its popular generalization $f(T)$ gravity can be formulated as fully invariant (under both coordinate transformations and local Lorentz transformations) theories of gravity.… Expand

Dynamics of multi-scalar-field cosmological models and assisted inflation

We investigate the dynamical properties of a class of spatially homogeneous and isotropic cosmological models containing a barotropic perfect fluid and multiple scalar fields with independent… Expand

Homogeneous scalar field cosmologies with an exponential potential

We shall study spatially homogeneous cosmological models containing a self-interacting scalar field with an exponential potential of the form V(φ)=Λekφ. The asymptotic properties of these models are… Expand

Stability of cosmological scaling solutions

- A. Billyard, A. Coley, R. Hoogen
- Physics
- 21 May 1998

We study the stability of cosmological scaling solutions within the class of spatially homogeneous cosmological models with a perfect fluid subject to the equation of state p_gamma=(gamma-1)… Expand

Braneworld cosmologies with non-local bulk effects

- R. Hoogen, Adam Horne
- Physics
- 5 August 2004

It is very common to ignore the non-local bulk effects in the study of braneworld cosmologies using the braneworld approach. However, we shall illustrate through the use of three different scenarios… Expand

Qualitative analysis of diagonal Bianchi type V imperfect fluid cosmological models

The Einstein field equations for diagonal Bianchi type V imperfect fluid cosmological models with both viscosity and heat conduction are set up as an autonomous system of differential equations using… Expand

Isotropization of scalar field Bianchi models with an exponential potential.

We study whether homogeneous cosmological models containing a self-interacting scalar field with an exponential potential [of the form V(φ)=Λekφ] isotropize. Following Heusler [M. Heusler, Phys.… Expand

Qualitative analysis of viscous fluid cosmological models satisfying the Israel-Stewart theory of irreversible thermodynamics

Isotropic and spatially homogeneous viscous fluid cosmological models are investigated using the truncated Israel-Stewart theory of irreversible thermodynamics to model the bulk viscous pressure. The… Expand

Future asymptotic behaviour of tilted Bianchi models of type IV and VIIh

Using dynamical systems theory and a detailed numerical analysis, the late-time behaviour of tilting perfect fluid Bianchi models of types IV and VIIh is investigated. In particular, vacuum… Expand

Stability analysis of multiple scalar field cosmologies with matter

We investigate the dynamics of a class of Robertson-Walker spacetimes containing multiple scalar fields and ordinary barotropic matter. The potentials for the scalar fields are assumed to be of an… Expand

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