Speaker
Zi-Han Li
Description
The latest Atacama Cosmology Telescope (ACT) Data Release 6 suggests the spectral index of the curvature perturbation n_s = 0.974 ± 0.003, about 0.01 larger than the Planck 2018 result, which revives chaotic inflation with a power-law potential V(ϕ) ∼ |ϕ|p. We revisit such a model in the light of ACT DR6, and carefully takes into account the intermediate oscillatory inflation stage after slow-roll inflation when p < 1. We find that such models are consistent with ACT DR6, which also implies p < 2/3 and T_reh ≥ 10^11 GeV.
