Video URL

https://pirsa.org/09090011

Generating scale-invariant fluctuations without inflation

Magueijo, J. (2009). Generating scale-invariant fluctuations without inflation. Perimeter Institute for Theoretical Physics. https://pirsa.org/09090011

Magueijo, Joao. Generating scale-invariant fluctuations without inflation. Perimeter Institute for Theoretical Physics, Sep. 24, 2009, https://pirsa.org/09090011 

          @misc{ scivideos_PIRSA:09090011,
            doi = {10.48660/09090011},
            url = {https://pirsa.org/09090011},
            author = {Magueijo, Joao},
            keywords = {Cosmology},
            language = {en},
            title = {Generating scale-invariant fluctuations without inflation},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2009},
            month = {sep},
            note = {PIRSA:09090011 see, \url{https://scivideos.org/pirsa/09090011}}
          }

Joao Magueijo Imperial College London

DOI 10.48660/09090011
Source Repository PIRSA
Collection
Talk Type Scientific Series
Subject

Abstract

I describe a number of techniques that allow for the generation of (near) scale-invariant fluctuations in the early Universe without inflation or ekpyrosis. The basic ingredient is a decaying maximal speed of propagation, for which a Universal law is found. Connections are made with k-essence, the cuscaton, and the DBI action. However the simplest realizations result from bimetric theories and deformed dispersion relations and DSR. A number of implications to theories of quantum gravity are discussed.