Conference talk David Wands

Speaker: 
David Wands
Affiliation: 
University of Portsmouth
Title: 
Primordial non-Gaussianity from inflation
Abstract: 

Inflation in the very early universe provides a simple model for the origin of structure in the universe from initial quantum fluctuations. Fluctuations of a free field have a Gaussian random distribution, but interactions and non-linearities can give rise to distinctive non-Gaussian distributions of primordial density perturbations. I will discuss how different types of non-Gaussianity may be revealed by observations of the cosmic microwave background anisotropies and large-scale structure in galaxy surveys. Non-Gaussian signatures could identify different physical mechanisms by which quantum field fluctuations during inflation are converted into primordial density perturbations after inflation.

Date: 
Wednesday, February 20, 2013 - 20:00