145 citations · 1.3k across the 29 of their papers we have counts for
14 papers · 1 filter
Biased Domain Wall Networks and their Gravitational Waves
Davide Barbini, Alessio Notari, Oriol Pujolàs +2
Cosmic Domain Wall networks are among the most interesting sources of a stochastic Gravitational Wave (GW) background from the early Universe. We present a thorough analysis of the…
Stupendously Large Primordial Black Holes from the QCD axion
Miguel Faria, Ricardo Z. Ferreira, Fabrizio Rompineve
The inflationary diffusion of (pseudo-)scalar fields with discrete symmetries can seed the formation of a gas of closed domain walls after inflation, when the distance between dege…
The Spectrum of Gravitational Waves from Annihilating Domain Walls
Alessio Notari, Fabrizio Rompineve, Francisco Torrenti
Networks of cosmic domain walls can form in the early Universe as a consequence of the spontaneous breaking of discrete symmetries. We study the production of a cosmological backgr…
Primordial gravitational wave backgrounds from phase transitions with next generation ground based detectors
Chiara Caprini, Oriol Pujolàs, Hippolyte Quelquejay-Leclere +2
Third generation ground-based gravitational wave (GW) detectors, such as Einstein Telescope and Cosmic Explorer, will operate in the Hz frequency band, with a b…
Reduced Hubble Tension in Dark Radiation Models after DESI 2024
Itamar J. Allali, Alessio Notari, Fabrizio Rompineve
We investigate the presence of extra relativistic degrees of freedom in the early Universe, contributing to the effective number of neutrinos , as $ΔN_\text{eff}\equi…
Collapsing Domain Wall Networks: Impact on Pulsar Timing Arrays and Primordial Black Holes
Ricardo Z. Ferreira, Alessio Notari, Oriol Pujolàs +1
Unstable domain wall (DW) networks in the early universe are cosmologically viable and can emit a large amount of gravitational waves (GW) before annihilating. As such, they provid…