60 citations · 169 across the 13 of their papers we have counts for
13 papers
Holography constrains quantum bounce
D. H. Coule
Recent work in quantum loop cosmology suggests the universe undergoes a bounce when evolving from a previous collapsing phase. However, with non-inflationary matter sources, the sc…
On initial conditions for inflationary and bouncing cosmologies
D. H. Coule
We consider the question of deriving initial conditions for scalar fields in driving both an early and late quintessence phase. The dark energy field presents an unresolved uniform…
Contrasting Quantum Cosmologies
D. H. Coule
We compare the recent loop quantum cosmology approach of Bojowald and co-workers with earlier quantum cosmological schemes. Because the weak-energy condition can now be violated at…
Is there paradox with infinite space?
D. H. Coule
We argue that whether the universe is infinite or finite is less crucial than usually supposed. Paradoxes of repeating behaviour in the infinite, or eternal inflationary, universe…
Quantum creation and inflationary universes: a critical appraisal
D. H. Coule
We contrast the possibility of inflation starting a) from the universe's inception or b) from an earlier non-inflationary state. Neither case is ideal since a) assumes quantum mech…
Quantum Cosmology and Open Universes
D. H. Coule, Jerome Martin
Quantum creation of Universes with compact spacelike sections that have curvature either closed, flat or open, i.e. are studied. In the flat and open cases, the supe…
Varying c cosmology and Planck value constraints
D. H. Coule
It has been suggested that by increasing the speed of light during the early universe various cosmological problems of standard big bang cosmology can be overcome, without requirin…
Achieving pole-law inflation:the extreme inflation
D. H. Coule
The pre-big bang's inflationary mechanism, when allowance is made for the rapid change of Newton's constant, is not actually of pole-law form . We give examples where pole-law infl…
Pre-big bang model has Planck problem
D. H. Coule
The pre-big bang's kinetic driven inflationary mechanism is not an adequate form of inflation: the Planck length grows more rapidly than the scale factor. In order to explain our l…
Quantum versions of Carlini-Mijić wormholes
A. Carlini, D. H. Coule, D. M. Solomons
We consider the quantum analogues of wormholes obtained by Carlini and Mijić (CM), who analytically continued closed universe models. To obtain wormholes when the strong energy con…
Canonical measure and the flatness of a FRW universe
D. H. Coule
We consider the claim of Hawking and Page that the canonical measure applied to a FRW universe with a massive scalar field can solve the flatness problem regardless of inflation. B…
Inflationary cosmology with a non-analytic Lagrangian
E. Bruning, D. Coule, C. Xu
We consider an alternative higher order gravity theory which is non-analytic in the Ricci curvature. It has power-law inflationary behaviour. This is further evidence that inflatio…
Can quantum wormholes set 0
D. H. Coule, D. Solomons
We find the quantum analogues of Carlini-Mijic wormholes and consider their application to the cosmological constant problem. In a simple model with only we differ with the res…