87 citations · 354 across the 10 of their papers we have counts for
6 papers · 1 filter
Resonant backreaction in axion inflation
Valerie Domcke, Veronica Guidetti, Yvette Welling +1
Axion inflation entails a coupling of the inflaton field to gauge fields through the Chern-Simons term. This results in a strong gauge field production during inflation, which back…
A simple, exact, model of quasi-single field inflation
Yvette Welling
In this note we present a simple but exact model of quasi-single field inflation \cite{Chen:2009zp, Chen:2009we}, in which the couplings between perturbations are completely contro…
Shift-Symmetric Orbital Inflation: single field or multi-field?
Ana Achúcarro, Edmund J. Copeland, Oksana Iarygina +3
We present a new class of two-field inflationary attractor models, known as `shift-symmetric orbital inflation', whose behaviour is strongly multi-field but whose predictions are r…
Lifting Primordial Non-Gaussianity Above the Noise
Yvette Welling, Drian van der Woude, Enrico Pajer
Primordial non-Gaussianity (PNG) in Large Scale Structures is obfuscated by the many additional sources of non-linearity. Within the Effective Field Theory approach to Standard Per…
Effective Theory of Large-Scale Structure with Primordial Non-Gaussianity
Valentin Assassi, Daniel Baumann, Enrico Pajer +2
We develop the effective theory of large-scale structure for non-Gaussian initial conditions. The effective stress tensor in the dark matter equations of motion contains new operat…
On the viability of m**2 phi**2 and natural inflation
Ana Achucarro, Vicente Atal, Yvette Welling
In the context of single field inflation, models with a quadratic potential and models with a natural potential with subplanckian decay constant are in tension with the Planck data…