2 papers
astro-ph.CO2026
Nonlinear Relativistic Effects on Cosmological Redshift Drift
Pierre Béchaz, Giuseppe Fanizza, Giovanni Marozzi +1
Using a fully gauge-invariant approach, we compute for the first time in the literature relativistic effects on the redshift drift up to second order in cosmological perturbation t…
gr-qc2024
Gauge invariant quantum backreaction in U(1) axion inflation
Davide Campanella Galanti, Pietro Conzinu, Giovanni Marozzi +1
We evaluate the quantum backreaction due to a gauge field coupled to a pseudo-scalar field driving a slow-roll inflationary stage, the so-called axion inflation. The backreaction i…