145 citations · 1.2k across the 20 of their papers we have counts for
7 papers · 1 filter
Generating the Curvature Perturbation at the End of Inflation in String Theory
D. H. Lyth, A. Riotto
In brane inflationary scenarios, the cosmological perturbations are supposed to originate from the vacuum fluctuations of the inflaton field corresponding to the position of the br…
Classicality of the primordial perturbations
David H. Lyth, David Seery
We show that during inflation, a quantum fluctuation becomes classical at all orders if it becomes classical at first order. Implications are discussed.
Curvature perturbation from symmetry breaking the end of inflation
Laila Alabidi, David Lyth
We consider a two-field hybrid inflation model, in which the curvature perturbation is predominantly generated at the end of inflation. By finely tuning the coupling of the fields…
A numerical study of non-gaussianity in the curvaton scenario
Karim A. Malik, David H. Lyth
We study the curvaton scenario using gauge-invariant second order perturbation theory and solving the governing equations numerically. Focusing on large scales we calculate the non…
Inflation models after WMAP year three
Laila Alabidi, David H. Lyth
The survey of models in astro-ph/0510441 is updated.For the first time, a large fraction of the models is ruled out at more than .
Non-gaussianity and cosmic uncertainty in curvaton-type models
D. H. Lyth
In curvaton-type models, observable non-gaussianity of the curvature perturbation would come from a contribution of the form , where is gaussian. I analyse this situat…