Landelijk Seminarium @ Z011 met colloquium Leonardo Senatore (Stanford & CERN)

1 maart 2013

Friday 1 March 2013
from 11.15-12.15 (Europe/Amsterdam)
location: CWI/Nikhef (Z011) 

This colloquium is part of the "Landelijk Seminarium @ Z011"

Speaker: Leonardo Senatore (Stanford & CERN)

Title: Effective Field Theory in Cosmology

Abstract:
The recent tremendous progress in Observational Cosmology makes it now sensitive to non-linear corrections in the evolution of the density perturbations during the early epochs of the universe. In this context, the effective field theory paradigm represents the ideal setup to explore and systematically study the signatures that come from interactions, and additionally to directly map what we are learning from data into theory. I will describe two recent applications of this paradigm to Cosmology: the Effective Field Theory of Inflation and the Effective Field Theory of Cosmological Large Scale Structures. The first example represents the general parametrization of adiabatic fluctuations around an inflationary solutions, and it allows us to study the non-Gaussian signatures of Inflation, that I will describe. The second example is in the context of the gravitational clustering of dark matter. In our universe matter perturbations are large on short distances and small on large distances: strongly coupled in the UV and weakly coupled in the IR. We formulate an effective description based on an IR effective fluid that allows us to set up a manifestly convergent perturbative expansion to describe weak dark matter clustering. This is expected to be important to understand observations from next generation cosmological surveys.

More info about the "Landelijk Seminarium"

link naar colloquia pagina

link naar colloquia overzicht in de Nikhef agenda