Holographic non-Gaussianities in general single-field inflation

Understand

We use holographic techniques to compute inflationary non-Gaussianities for general single-field inflation, including models with a non-trivial sound speed.

• In this holographic approach, the inflationary dynamics is captured by a relevant deformation of the dual conformal field theory (CFT) in the UV, while the inflationary correlators are computed by conformal perturbation theory.
• In this paper, we discuss the effects of higher derivative operators, such as $(\partial_\mu\phi\partial^\mu\phi)^{m}$, which are known to induce a non-trivial sound speed and source potentially large non-Gaussianities.
• We compute the full inflationary bispectra from the deformed CFT correlators.