Forecasting constraints on quintessential inflation from future generation of galaxy and CMB surveys

G. Rodrigues; F. B. M. dos Santos; S. Santos da Costa; J. G. Rodrigues; R. von Marttens; R. Silva; D. F. Mota; J. S. Alcaniz

paper

Forecasting constraints on quintessential inflation from future generation of galaxy and CMB surveys

arXiv:2506.22384

Abstract

We investigate the constraining power of future CMB and galaxy surveys on models of quintessential inflation realized within the framework of $I^\pm$ -attractors. We analyze how these future datasets will probe the parameter space of $I^\pm$ -attractor quintessential inflation, specifically the inflationary potential parameters. Our results demonstrate that the synergy between CMB-S4, LiteBIRD, and Euclid can significantly tighten the bounds on the model parameters, achieving forecasted $1 I ¨ $ uncertainties of $I^\pm = 2 \pm 0.17$ , $n_{s} = 0.965 \pm 0.0014$ , $ln (1 0^{10} A_{s}) = 3.0447 \pm 0.0029$ for the CMB+GC $_{s p}$ case. This level of sensitivity will enable us to discriminate between different realizations of quintessential inflation and test the attractor behavior characteristic of these models.