Speaker
Ángel García Vega
(Instituto de Física, UNAM)
Description
We study a model in which scalar fields generate gravitational waves through 4-point correlation functions, originating from the scalar power spectrum. The resulting gravitational wave spectrum depends on the couplings of the scalar fields and is predominantly blue-tilted, which automatically satisfies the constraints on CMB scales.
The novelty of our approach lies in computing the gravitational spectrum on super-horizon scales. This regime is particularly interesting, since classical lattice simulations are restricted to sub-horizon scales and, as we show, the super-horizon spectrum is closer to the sensitivity ranges of current and future gravitational wave experiments.
Authors
Marcos Alejandro García García
(Instituto de Física, UNAM)
Ángel García Vega
(Instituto de Física, UNAM)