HET Brown Bag Seminar | Holography for Inflationary Cosmology | Speaker: Paul McFadden (Perimeter)

Speaker: Paul McFadden (Perimeter)

We present a holographic framework for cosmology enabling four-dimensional inflationary universes to be described in terms of three-dimensional dual quantum field theories. Cosmological observables, such as the primordial power spectra and non-Gaussianities, are related to correlation functions of the dual QFT through specific holographic formulae. Through perturbative calculations for a simple class of dual QFTs, we compute holographically the observational signatures of a universe emerging from a non-geometric phase in which the gravitational description in strongly coupled at early times.