PIRSA:08060146

Video URL

https://pirsa.org/08060146

Non-Gaussianity from preheating

Rajantie, A. (2008). Non-Gaussianity from preheating. Perimeter Institute for Theoretical Physics. https://pirsa.org/08060146

Rajantie, Arttu. Non-Gaussianity from preheating. Perimeter Institute for Theoretical Physics, Jun. 03, 2008, https://pirsa.org/08060146 

          @misc{ scivideos_PIRSA:08060146,
            doi = {10.48660/08060146},
            url = {https://pirsa.org/08060146},
            author = {Rajantie, Arttu},
            keywords = {Quantum Fields and Strings, Particle Physics, Cosmology},
            language = {en},
            title = {Non-Gaussianity from preheating},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2008},
            month = {jun},
            note = {PIRSA:08060146 see, \url{https://scivideos.org/pirsa/08060146}}
          }

Arttu Rajantie Imperial College London

Talk numberPIRSA:08060146
DOI10.48660/08060146
Source RepositoryPIRSA
Collection
Talk Type Conference
Subject

Abstract

If light scalar fields are present at the end of inflation, their nonequilibrium dynamics can produce non-Gaussian density perturbations. Lattice field theory simulations show that this effect can be very strong in the massless preheating model. It is therefore an important factor in assessing the viability of inflationary models. I present a phenomenological model that can be used to calculate the perturbations analytically.