3 papers
astro-ph.CO2026
Primordial Gravitational Waves from Scalar Backreaction in Axion-SU(2) Inflation
Mattia Cielo, Ema Dimastrogiovanni, Matteo Fasiello +1
In this work, we perform the first numerical study of strong scalar backreaction in spectator chromo-natural inflation (SCNI) in the case where the spectator sector decays during i…
gr-qc2025
Quantum Recoherence in Presence of Excited States in the Early Universe
Mattia Cielo, Simone Scarlatella, Gianpiero Mangano +2
We investigate the quantum-to-classical transition of primordial perturbations within a two-field inflationary framework where an adiabatic mode interacts with an entropic environm…
astro-ph.CO2024
Steepest Growth in the Primordial Power Spectrum from Excited States at a Sudden Transition
Mattia Cielo, Gianpiero Mangano, Ofelia Pisanti +1
Sudden phase transitions during inflation can give rise to strongly enhanced primordial density perturbations on scales much smaller than those directly probed by cosmic microwave…