4 papers
Inflation in gravity models revisited after ACT
Sergei V. Ketov, Ekaterina O. Pozdeeva, Sergey Yu. Vernov
The gravity models of inflation are revisited in light of the recent observations of cosmic microwave background radiation by Atacama Cosmology Telescope (ACT) and DESI Coll…
Primordial black holes formation in inflationary models with scalar fields
E. O. Pozdeeva, S. Yu. Vernov
We construct gravity models with scalar fields to describe cosmological inflation and formation of primordial black holes (PBHs). By adding the induced gravity term and the…
More accurate slow-roll approximations for inflation in scalar-tensor theories
Ekaterina O. Pozdeeva, Maria A. Skugoreva, Alexey V. Toporensky +1
We propose new versions of the slow-roll approximation for inflationary models with nonminimally coupled scalar fields. We derive more precise expressions for the standard slow-rol…
Slow-roll approximations in Einstein--Gauss--Bonnet gravity formulated in terms of e-folding numbers
E. O. Pozdeeva
In the Einstein--Gauss--Bonnet (EGB) gravity models, the slow-roll approximation has been extended by taking into account the first-order slow-roll parameter $δ_1 =-2\,H^2\,ξ^\pr…