5 citations · 7 across the 10 of their papers we have counts for
9 papers · 1 filter
Lukewarm inflation and the QCD axion
Paulo B. Ferraz, António Torres Manso, João G. Rosa
We show that a late period of warm inflation, at temperatures just above the QCD scale, can dilute the abundance of the QCD axion produced by the misalignment mechanism, thus avoid…
Lukewarm inflation, primordial black holes and gravitational waves
Paulo B. Ferraz, António Torres Manso, João G. Rosa
We show that a secondary period of warm inflation, at temperatures parametrically below the GUT scale, may not only dilute any unwanted thermal relics formed after reheating but al…
String Axiverse Enhancement of Superradiant Dark Matter Production
Diogo S. Gorgulho, Jacob A. Litterer, João G. Rosa
We study the effects of string axion emission on dark matter production by light primordial black holes (PBHs), through both evaporation and superradiance. We show, in particular,…
Dark neutron stars from a heavy dark sector
Jacob A. Litterer, João G. Rosa
We study the formation and properties of dark neutron stars in a scenario where dark matter is made up of (heavy) dark baryons in a sequestered copy of the MSSM. This scenario natu…
Preheated inflation
Diogo S. Gorgulho, João G. Rosa
We propose a new mechanism of non-thermal particle production during inflation based on a narrow parametric resonance, akin to the dynamics of post-inflationary preheating. The mec…
The inflation trilogy and primordial black holes
Paulo B. Ferraz, João G. Rosa
We propose an inflation scenario with three independent stages of cold, warm and thermal inflation, respectively, driven by different scalar fields, motivated by the large number o…
Superradiant Darwinism: survival of the lightest axion
Daniel Neves, João G. Rosa
We study the dynamical evolution of superradiant instabilities of rotating black holes for multiple axion fields with comparable masses, motivated by string theory constructions, w…
Evaporating Kerr black holes as probes of new physics
Marco Calzà, João G. Rosa
In the string axiverse scenario, primordial black holes (PBHs) can sustain non-negligible spin parameters as they evaporate. We show that tracking both the mass and spin evolution…
Thermal curvature perturbations in thermal inflation
Mar Bastero-Gil, Joaquim M. Gomes, João G. Rosa
We compute the power spectrum of super-horizon curvature perturbations generated during a late period of thermal inflation, taking into account fluctuation-dissipation effects resu…