Topic
Institut des Hautes Etudes Scientifiques (IHES)
The lecture begins with a review of perturbation theory in quantum field theory applied to cosmology, where correlation functions are calculated by separating the action into quadratic and interaction components. This approach treats interactions as derivatives acting on a Gaussian path integral, re …
Institut des Hautes Etudes Scientifiques (IHES)
The lecture begins by refining previous constraints on cubic vertices, noting that recent corrections regarding the third slow-roll parameter relax bounds on three-point function coefficients to levels where detection via 21 cm signals remains challenging. The core of the discussion focuses on mecha …