From the 1 of 8 linked papers with an AI index.
8 papers
Pushing the Primordial Frontier: Cosmological Collider Signatures at Strong Mixing
Javier Huenupi, Claudio Muñoz, Gonzalo A. Palma +1
The paper presents an analytic method to study primordial non‑Gaussianity in multifield inflation that fully accounts for strong curvature‑isocurvature mixing, providing exact bisp…
Pushing the Primordial Frontier: Exact Linear Solutions in Multifield Inflation
Javier Huenupi, Claudio Muñoz, Gonzalo A. Palma +1
We present exact analytic solutions for the linear dynamics of a two-field inflationary system in which the primordial curvature perturbation is coupled to an isocurvature per…
Revisiting stochastic inflation with perturbation theory
Gonzalo A. Palma, Spyros Sypsas
A long-standing problem in primordial cosmology is to understand the precise relation between the stochastic formalism and standard perturbation theory for light scalar fields in i…
Non-Gaussian statistics of de Sitter spectators: A perturbative derivation of stochastic dynamics
Gonzalo A. Palma, Spyros Sypsas
Scalar fields interacting with the primordial curvature perturbation during inflation may communicate their statistics to the latter. This situation motivates the study of how the…
Confronting infrared divergences in de Sitter: loops, logarithms and the stochastic formalism
Gonzalo A. Palma, Spyros Sypsas, Danilo Tapia
A well-established result in quantum field theory in four-dimensional de Sitter space is that the vacuum state of a massless scalar field breaks the de Sitter isometry group, leadi…
A note on loop resummation in de Sitter spacetime with the wavefunction of the universe approach
Javier Huenupi, Ellie Hughes, Gonzalo A. Palma +1
We analyze the computation of -point correlation functions in de Sitter spacetime, including loop corrections, using the wavefunction of the universe approach. This method consi…