Small fluctuations around homogeneous and isotropic expanding backgrounds are the main
object of study in cosmology. Their origin and evolution is sensitive to the physical …

Scalar fields have been widely used in cosmology during the last three decades, but it is
until now that we have been able to fully understand their role as possible major matter …

Heavy isocurvature fields may have a strong influence on the low energy dynamics of
curvature perturbations during inflation, as long as the inflationary trajectory becomes non …

We describe models of single-field inflation with small and sharp step features in the
potential (and sound speed) of the inflaton field, in the context of the Effective Field Theory of …

Abstract The application of Effective Field Theory (EFT) methods to inflation has taken a
central role in our current understanding of the very early universe. The EFT perspective has …

Recently, new arguments [E. Barausse, S. Matarrese, and A. Riotto, Phys. Rev. D 71,
063537 (2005). PRVDAQ 0556-2821 10.1103/PhysRevD. 71.063537][EW Kolb, S …

Using an effective field theory approach to inflation, we examine novel properties of the
spectrum of inflationary tensor fluctuations, that arise when breaking some of the symmetries …

Using the techniques of out-of-equilibrium field theory, we study the influence on properties
of cosmological perturbations generated during inflation on observable scales coming from …

We explore the consequences of a detection of primordial tensor fluctuations for general
single-field models of inflation. Using the effective theory of inflation, we propose a …

The purpose of these lectures is to give a pedagogical introduction to inflation and the
production of the primordial perturbations, as well as a review of some of the latest …