Speaker
Diego Cruces
(ITP-CAS)
Description
Contrary to what it is typically done in the literature, we re-formulate the δN formalism by using the e-folding number n counted forward in time. Taking advantage of the complete (anti-)correlation of the initial field perturbation δϕ0 with its conjugate momenta δπ0, we find a simple formula to calculate the non-linear curvature perturbation as well as its PDF by using the δN method reformulated in terms of n, the δn formalism. We will also explore the connection of the δn formalism with the non-linear equation of motion for the curvature perturbation at superhorizon scales.
Primary author
Diego Cruces
(ITP-CAS)
