53 citations · 97 across the 5 of their papers we have counts for
5 papers
Stochastic inflation from a non-equilibrium renormalization group
Sebastián Céspedes, Thomas Colas
Understanding stochastic inflation, and in particular the systematic computation of controlled corrections from first principles, remains an important open problem. In this work, w…
Scale-Dependent Loop Corrections to the Inflationary Power Spectrum
Matteo Braglia, Sebastián Céspedes, Lucas Pinol
Loop corrections to primordial correlation functions are unavoidable due to the non-linear nature of gravity. Previous works have established a robust framework for computing the r…
Causality Bounds on the Primordial Power Spectrum
Mariana Carrillo González, Sebastián Céspedes
Effective field theories (EFTs) parametrize our ignorance of the underlying UV theory through their Wilson coefficients. However, not all values of these coefficients are consisten…
On the IR Divergences in de Sitter Space: loops, resummation and the semi-classical wavefunction
Sebastián Céspedes, Anne-Christine Davis, Dong-Gang Wang
In this paper, we revisit the infrared (IR) divergences in de Sitter (dS) space using the wavefunction method, and explicitly explore how the resummation of higher-order loops lead…
Large power spectrum and primordial black holes in the effective theory of inflation
Guillermo Ballesteros, Sebastián Céspedes, Luca Santoni
We study the generation of a large power spectrum, necessary for primordial black hole formation, within the effective theory of single-field inflation. The mechanisms we consider…