3 papers
astro-ph.CO2025
Probing the Perturbative Reheating History of Decaying Oscillatory Inflation with ACT Constraints
Li-Yang Chen, Rongrong Zhai, Feng-Yi Zhang
Precision measurements of the Cosmic Microwave Background (CMB) now offer a powerful probe of the unknown reheating epoch. In this work, we scrutinize a decaying oscillatory inflat…
gr-qc2025
Reconciling the ACT Preference in Gravity: Inflation and Reheating Constraints
Feng-Yi Zhang, Rongrong Zhai, Li-Yang Chen
Compared with the results of Planck-only analyses, recent measurements from the Atacama Cosmology Telescope (ACT) indicate a preference for a slightly bluer scalar spectral index,…
gr-qc2025
Frame-Dependence of the Hamilton-Jacobi Formalism for Inflation and Reheating in Non-Minimal Gravity
Feng-Yi Zhang, Li-Yang Chen, Rongrong Zhai
In this work, we investigate the Hamilton-Jacobi formalism for non-minimally coupled inflation, focusing on the methodological frame-dependence arising from its application in the…