PIRSA:08060146

Non-Gaussianity from preheating

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

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

          @misc{ pirsa_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},
            year = {2008},
            month = {jun},
            note = {PIRSA:08060146 see, \url{https://pirsa.org}}
          }

Arttu Rajantie

Imperial College London

Talk number
PIRSA:08060146
Collection
Talk Type
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.