234 citations · 2.3k across the 73 of their papers we have counts for
74 papers
Integrability of gravity cosmological models with radiation
Vsevolod R. Ivanov, Sergey Yu. Vernov
We consider cosmological gravity models with radiation. We find the general solution to the trace equation in the spatially flat Friedmann-Lemaitre-Robertson-Walke…
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…
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…
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…
New Integrable Chiral Cosmological Models with Two Scalar Fields
Vsevolod R. Ivanov, Sergey Yu. Vernov
We construct integrable chiral cosmological models with two scalar fields and potentials represented in terms of hyperbolic functions. Using the conformal transformation of the met…
Integrable Cosmological Models with an Arbitrary Number of Scalar Fields
V. R. Ivanov, S. Yu. Vernov
We consider cosmological models with an arbitrary number of scalar fields nonminimally coupled to gravity and construct new integrable cosmological models. In the constructed model…