Generating scale-invariant fluctuations without inflation


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


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


          @misc{ pirsa_09090011,
            doi = {},
            url = {https://pirsa.org/09090011},
            author = {Magueijo, Joao},
            keywords = {Cosmology},
            language = {en},
            title = {Generating scale-invariant fluctuations without inflation},
            publisher = {Perimeter Institute},
            year = {2009},
            month = {sep},
            note = {PIRSA:09090011 see, \url{https://pirsa.org}}

Joao Magueijo Imperial College London


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.