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Primordial non-Gaussianity from two curvaton decays
Hooshyar Assadullahi, Jussi Valiviita, David Wands
We study a model where two scalar fields, that are subdominant during inflation, decay into radiation some time after inflation has ended but before primordial nucleosynthesis. Per…
Generating the curvature perturbation without an inflaton
David H. Lyth, David Wands
We present a mechanism for the origin of the large-scale curvature perturbation in our Universe by the late decay of a massive scalar field, the curvaton. The curvaton is light dur…
Super-horizon perturbations and preheating
Andrew R. Liddle, David H. Lyth, Karim A. Malik +1
It has recently been claimed by Bassett et al that preheating after inflation may affect the amplitude of curvature perturbations on large scales, undermining the usual inflationar…
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…