Density Perturbations from Curvatons Revisited

          @misc{ pirsa_PIRSA:12040058,
            doi = {10.48660/12040058},
            url = {https://pirsa.org/12040058},
            author = {Kobayashi, Takeshi},
            keywords = {Cosmology},
            language = {en},
            title = {Density Perturbations from Curvatons Revisited},
            publisher = {Perimeter Institute},
            year = {2012},
            month = {apr},
            note = {PIRSA:12040058 see, \url{https://pirsa.org}}
          }
          

Abstract

The curvaton scenario provides a simple explanation for the generation of the cosmological perturbations, however most works have focused on cases with rather trivial curvaton energy potentials, e.g. quadratic ones. In this talk I will present the rich phenomenology of curvatons by showing that non-quadratic curvatons exhibit new behaviors, leading to interesting signals in the resulting density perturbations. A string theory realization of the curvaton scenario will also be discussed, where D-branes located in a warped throat region of the internal space play the role of curvatons.