Recent observations about the cosmic microwave background evidence a clear discrepancy
between the scale of inflation and the Planck scale expected in the conventional inflationary …

The Hubble tension refers to the discrepancy in the value of the Hubble constant H 0
inferred from the cosmic microwave background observations, assuming the concordance Λ …

We study the inflationary model with a spectator scalar field χ coupled to both the inflaton
and Ricci scalar. The interaction between the χ field and the gravity, denoted by ξ R χ 2, can …

In this work, we consider intermediate inflation in the context of the generalized non-minimal
derivative coupling (GNMDC) model. In the GNMDC model, inflation is driven by a canonical …

The Hubble tension refers to the discrepancy in the value of the Hubble constant $ H_0 $
inferred from the cosmic microwave background observations, assuming the concordance …

After Planck's results came out, it became evident that inflation could not initiate at the
Planck time with the universe's density being the Planck density. More specifically, Planck's …