30 citations · 60 across the 8 of their papers we have counts for
8 papers
How Dilatation Invariance Suppresses Loop Corrections to Curvature Perturbations on CMB Scales
Danilo Artigas, Shi Pi, Takahiro Tanaka +1
Departures from standard slow-roll (SR) inflation have attracted increasing interest in recent years. In particular, scenarios that strongly enhance the power spectrum of the curva…
On the Hamilton-Jacobi approach to inflation beyond slow roll
Danilo Artigas, Emmanuel Frion, Tays Miranda +2
The Hamilton-Jacobi approach is a powerful tool to describe super-Hubble dynamics during cosmological inflation in a non-linear way. A key assumption of this framework is to neglec…
Extended formalism: Nonspatially Flat Separate Universe Approach
Danilo Artigas, Shi Pi, Takahiro Tanaka
The formalism is a powerful approach to compute non-linearly the large-scale evolution of the comoving curvature perturbation . It assumes a set of FLRW patches that evolve…
Hamiltonian formalism for cosmological perturbations: fixing the gauge
Danilo Artigas, Julien Grain, Vincent Vennin
Cosmological perturbation theory is an example of a gauge theory, where gauge transformations correspond to changes in the space-time coordinate system. To determine physical quant…
Squeezing of light from Planck-scale physics
Danilo Artigas, Killian Martineau, Jakub Mielczarek
In this article, the possibility of generating non-classical light due to Planck-scale effects is considered. For this purpose, a widely studied model of deformation of the Heisenb…
Hamiltonian formalism for cosmological perturbations: the separate-universe approach
Danilo Artigas, Julien Grain, Vincent Vennin
The separate-universe approach provides an effective description of cosmological perturbations at large scales, where the universe can be described by an ensemble of independent, l…