R
Roy Maartens
Researcher at University of the Western Cape
Publications - 445
Citations - 26405
Roy Maartens is an academic researcher from University of the Western Cape. The author has contributed to research in topics: Dark energy & Redshift. The author has an hindex of 86, co-authored 432 publications receiving 23747 citations. Previous affiliations of Roy Maartens include Institute of Cosmology and Gravitation, University of Portsmouth & University of Arizona.
Papers
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Brane-World Gravity
Roy Maartens,Kazuya Koyama +1 more
TL;DR: In this article, the authors discuss the geometry, dynamics and perturbations of simple brane-world models for cosmology and astrophysics, mainly focusing on warped 5-dimensional braneworlds based on the Randall-Sundrum models.
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Adiabatic and entropy perturbations from inflation
TL;DR: In this article, a local rotation in field space is performed to separate out the adiabatic and entropy modes, and the resulting field equations show explicitly how on large scales entropy perturbations can source adiabaatic perturbation if the background solution follows a curved trajectory in the field space.
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Black holes on the brane
TL;DR: In this article, exact solutions for static black holes localized on a three-brane in five-dimensional gravity in the Randall-Sundrum scenario were considered. But the results in this paper are restricted to the case where only one horizon is admitted, outside the Schwarzschild horizon.
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The emergent universe: inflationary cosmology with no singularity
George F. R. Ellis,Roy Maartens +1 more
TL;DR: The role of positive curvature is negligible at late times, but can be crucial in the early universe as mentioned in this paper, allowing for cosmologies that originate as Einstein static universes, and then inflate and later reheat to a hot big-bang era.
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Chaotic inflation on the brane
TL;DR: In this article, the authors 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 gravity.