5 papers
When the Environment Speaks: Quantum Signatures in Non-Attractor Inflation
Mattia Cielo, Simone Scarlatella, Gianpiero Mangano +1
We study the open quantum dynamics of the adiabatic curvature perturbation interacting with a massive entropic scalar environment during an inflationary scenario featuring a transi…
Isochrones in primordial magnetic field evolution
Axel Brandenburg, Mattia Cielo, Oksana Iarygina +1
During the radiation-dominated era of the Universe, a primordial magnetic field undergoes a turbulent decay while its length scale increases due to an inverse cascade. At later tim…
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…
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…
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…