871 citations · 18.5k across the 224 of their papers we have counts for
8 papers · 1 filter
Chaotic inflation on the brane
R Maartens, D Wands, B Bassett +1
We consider slow-roll inflation in the context of recently proposed four-dimensional effective gravity induced on the world-volume of a three-brane in five-dimensional Einstein gra…
Cosmological perturbations on a magnetised Bianchi I background
Christos Tsagas, Roy Maartens
Motivated by the isotropy of the CMB spectrum, all existing studies of magnetised cosmological perturbations employ FRW backgrounds. However, it is important, to know the limits of…
Restoring the sting to metric preheating
Bruce A. Bassett, Christopher Gordon, Roy Maartens +1
The relative growth of field and metric perturbations during preheating is sensitive to initial conditions set in the preceding inflationary phase. Recent work suggests this may pr…
Nonlinear Effects in the Cosmic Microwave Background
Roy Maartens
Major advances in the observation and theory of cosmic microwave background anisotropies have opened up a new era in cosmology. This has encouraged the hope that the fundamental pa…
Magnetized cosmological perturbations
Christos Tsagas, Roy Maartens
A large-scale cosmic magnetic field affects not only the growth of density perturbations, but also rotational instabilities and anisotropic deformation in the density distribution.…
Metric preheating and limitations of linearized gravity
Bruce A. Bassett, Fabrizio Tamburini, David I. Kaiser +1
Recently it has become clear that the resonant amplification of quantum field fluctuations at preheating must be accompanied by resonant amplification of scalar metric perturbation…