Theory HEP Seminar

Holographic slow-roll inflation

Paul McFadden

Perimeter Institute

Holographic cosmology maps cosmological time evolution to the inverse RG flow of a dual three-dimensional Euclidean QFT. In cases where this RG flow connects two closely separated fixed points, QFT correlators may be calculated perturbatively in terms of the conformal field theory associated with one of the fixed points. Realising slow-roll inflation in these terms, we show how to re-derive standard slow-roll inflationary power spectra and non-Gaussianities from a purely holographic perspective. The form of slow-roll inflationary correlators is determined by the perturbative breaking of conformal symmetry as we move away from a fixed point of the dual QFT.