3 papers
hep-th2026
Background-independent one-loop renormalization of tensor and scalar primordial spectra
Guillermo Ballesteros, Jesús Gambín Egea, Flavio Riccardi
We present a background-independent renormalization framework for one-loop primordial spectra. We apply it to two observables: the scalar-induced tensor spectrum sourced by a minim…
hep-th2026
An ode to instantons
Oliver Janssen, Joel Karlsson, Flavio Riccardi +1
We present a formalism for semiclassical time evolution in quantum mechanics, building on a century of work. We identify complex saddle points in real time, real saddle points in c…
hep-th2024
Finite parts of inflationary loops
Guillermo Ballesteros, Jesús Gambín Egea, Flavio Riccardi
We present a method for solving loop integrals in dimensional regularization that is particularly useful in the context of inflation. We apply this method to the calculation of the…