Gravity Group Astrophysics|Cosmology Lunch: Alberto Nicolis, "Icosahedral Inflation"(More about event)
I will describe "icosahedral inflation”, a generalization of solid inflation in which the fluctuations’ dynamics are not invariant under continuous rotations, but only under the icosahedral subgroup. I will argue that that is the only discrete subgroup of rotations compatible with exact isotropy of the background and of the scalar modes’ spectrum, in agreement with observations. The scalar modes’ three-point function however is naturally anisotropic, potentially maximally so. This leaves open the possibility that a large non-gaussian signal is still hiding in the Planck data, and that only a dedicated anisotropic analysis will be able to uncover it. I will also discuss implications of this scenario for the tensor modes’ spectrum.
Location: Joseph Henry Room
Date/Time: 04/11/14 at 12:00 pm - 04/11/14 at 1:30 pm
Category: Gravity Group Seminar