4 papers
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…
Freezing of the renormalized one-loop primordial scalar power spectrum
Matteo Braglia, Lucas Pinol
The predictive power of cosmic inflation hinges on the existence of a conserved quantity at very large scales, called the primordial curvature perturbation, which is therefore inse…
One-loop renormalization of the effective field theory of inflationary fluctuations from gravitational interactions
Matteo Braglia, Lucas Pinol
We dig into the semi-classical description of gravity by studying one-loop corrections to primordial power spectra generated during cosmic inflation from gravitational nonlinear in…
No time to derive: unraveling total time derivatives in in-in perturbation theory
Matteo Braglia, Lucas Pinol
The in-in formalism provides a way to systematically organize the calculation of primordial correlation functions. Although its theoretical foundations are now firmly settled, the…