401 citations · 3.5k across the 58 of their papers we have counts for
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Tachyonic Encore: A universal shift of inflationary observables
Diogo S. Gorgulho, Margherita Putti, Rodrigo Gonzalez Quaglia +3
We propose a generic, largely inflaton-potential-independent mechanism in which a light axion spectator, initialized near the hilltop of its potential, reshapes inflationary observ…
Gravitational Axiverse Spectroscopy: Seeing the Forest for the Axions
Ema Dimastrogiovanni, Matteo Fasiello, Jacob M. Leedom +2
We consider inflationary models with multiple spectator axions coupled to dark gauge sectors via Chern-Simons (CS) terms. The energy injection into Abelian gauge fields from the ax…
Low-Energy Effective Field Theory for Chromo-Natural Inflation
Emanuela Dimastrogiovanni, Matteo Fasiello, Andrew J. Tolley
Chromo-natural inflation is a novel model of inflation which relies on the existence of non-abelian gauge fields interacting with an axion. In its simplest realization, an SU(2) ga…
Perturbation Growth in Anisotropic Cosmologies
E. Dimastrogiovanni, W. Fischler, S. Paban
We study the growth of perturbations in an expanding Bianchi type-I metric that evolves according to an energy density that includes dust and a cosmological constant. Assuming an e…