2k citations · 6.7k across the 19 of their papers we have counts for
19 papers
On the Scale of Inflation
C. Armendariz-Picon
Because the scale of inflation is conformal frame dependent, in order to fully characterize it one should quote its value in terms of all the independent equal-time dimensionless r…
Bayesian Limits on Primordial Isotropy Breaking
C. Armendariz-Picon, Larne Pekowsky
It is often assumed that primordial perturbations are statistically isotropic, which implies, among other properties, that their power spectrum is invariant under rotations. In thi…
Creating Statistically Anisotropic and Inhomogeneous Perturbations
C. Armendariz-Picon
In almost all structure formation models, primordial perturbations are created within a homogeneous and isotropic universe, like the one we observe. Because their ensemble averages…
Why should primordial perturbations be in a vacuum state?
C. Armendariz-Picon
In order to calculate the power spectrum generated during a stage of inflation, we have to specify the quantum state of the inflaton perturbations, which is conventionally assumed…
Near Scale Invariance with Modified Dispersion Relations
C. Armendariz-Picon
We describe a novel mechanism to seed a nearly scale invariant spectrum of adiabatic perturbations during a non-inflationary stage. It relies on a modified dispersion relation that…
Footprints of Statistical Anisotropies
C. Armendariz-Picon
We propose and develop a formalism to describe and constrain statistically anisotropic primordial perturbations. Starting from a decomposition of the primordial power spectrum in s…