15 citations · 21 across the 7 of their papers we have counts for
7 papers
The unavoidable de Sitter fate of a scale-invariant Universe
Chiara Cecchini, Massimiliano Rinaldi
We consider a very general scale-invariant scalar-tensor theory of gravity and its flat cosmological solutions. We show that any stable configuration with non-degenerate gravitatio…
Are PTA measurements sensitive to gravitational wave non-Gaussianities?
Chiara Cecchini, Jonas El Gammal, Gabriele Franciolini +1
Observing non-Gaussianities in the timing residuals of Pulsar Timing Arrays (PTAs) has recently attracted attention as a potential discriminator between astrophysical and cosmologi…
Forecasting Constraints on SIGW with Future Pulsar Timing Array Observations
Chiara Cecchini, Gabriele Franciolini, Mauro Pieroni
Pulsar Timing Arrays are playing a crucial role in the ongoing gravitational wave astronomy revolution. The current evidence for a stochastic gravitational wave background (SGWB) a…
Tracing cosmic stretch marks: probing scale invariance in the early Universe
Mariaveronica De Angelis, Chiara Cecchini, Massimiliano Rinaldi
This paper investigates a scale-invariant inflationary model characterized by a scalar field non-minimally coupled to gravity and a curvature term quadratic in the Ricci scalar. Th…
Testing scale-invariant inflation against cosmological data
Chiara Cecchini, Mariaveronica De Angelis, William Giarè +2
There is solid theoretical and observational motivation behind the idea of scale-invariance as a fundamental symmetry of Nature. We consider a recently proposed classically scale-i…
Scale-invariant inflation
Massimiliano Rinaldi, Chiara Cecchini, Anish Ghoshal +1
We examine a scalar-tensor model of gravity that is globally scale-invariant. When adapted to a spatially flat Robertson-Walker metric, the equations of motion describe a dynamical…
Inflationary helical magnetic fields with a sawtooth coupling
Chiara Cecchini, Massimiliano Rinaldi
We study the generation of helical magnetic fields during inflation by considering a model which does not suffer from strong coupling or large back-reaction. Electromagnetic confor…