Zobrazeno 1 - 10
of 109
pro vyhledávání: '"Pozdeeva, E."'
Autor:
Pozdeeva, E. O., Vernov, S. Yu.
We propose a two-field inflationary model with the induced gravity term. Using conformal transformation of the metric, we get the chiral cosmological model with two scalar fields. We demonstrate that the constructed inflationary model does not contra
Externí odkaz:
http://arxiv.org/abs/2407.00999
Autor:
Pozdeeva, E. O.
Publikováno v:
Eur.Phys.J.C 80 (2020) 7,612
We construct models with the Gauss-Bonnet term multiplied to a function of the scalar field leading to inflationary scenario. The consideration is related with the slow-roll approximation. The cosmological attractor approach gives the spectral index
Externí odkaz:
http://arxiv.org/abs/2005.10133
Publikováno v:
Phys. Part. Nuclei 51 (2020) 744
We construct the $F(R)$ gravity models with exact particular solutions using the conformal transformation and the superpotential method for the corresponding models in the Einstein frame. The functions $F(R)$ are obtained explicitly. We consider exac
Externí odkaz:
http://arxiv.org/abs/1912.07049
Publikováno v:
Phys. Rev. D 100, 063522 (2019)
We consider the Chiral Cosmological Models (CCMs) and modified gravity theories associated with them. Generalization of the superpotential method for a general CCM with several scalar fields is performed, and the method of construction CCMs admitting
Externí odkaz:
http://arxiv.org/abs/1904.11264
Publikováno v:
Int. J. Geom. Meth. Mod. Phys. 15 (2018) 1850188
The cosmological dynamics of a non-locally corrected gravity theory, involving a power of the inverse d'Alembertian, is investigated. Casting the dynamical equations into local form, the fixed points of the models are derived, as well as correspondin
Externí odkaz:
http://arxiv.org/abs/1805.10810
Publikováno v:
Int. J. Geom. Methods Mod. Phys. 15 (2018) 1840001
Inflationary scenarios motivated by the Minimal Supersymmetric Standard Model (MSSM) where five scalar fields are non-minimally coupled to gravity are considered. The potential of the model and the function of non-minimal coupling are polynomials of
Externí odkaz:
http://arxiv.org/abs/1712.03072
Autor:
Pozdeeva, E. O., Vernov, S. Yu.
Publikováno v:
Phys. Part. Nuclei 49 (2018) 914
We study dynamics of induced gravity cosmological models with the sixth degree polynomial potentials, that have been constructed using the superpotential method. We find conditions on the potential under which exact bounce solutions exist and study t
Externí odkaz:
http://arxiv.org/abs/1711.06255
Autor:
Kamenshchik, A. Yu., Pozdeeva, E. O., Starobinsky, A. A., Tronconi, A., Venturi, G., Vernov, S. Yu.
Publikováno v:
Phys. Rev. D 97, 023536 (2018)
We study the cosmological evolution and singularity crossing in the Bianchi-I universe filled with a conformally coupled scalar field and compare them with those of the Bianchi-I universe filled with a minimally coupled scalar field. We also write do
Externí odkaz:
http://arxiv.org/abs/1710.02681
Publikováno v:
JHEP 1712 (2017) 036
Despite the fact that experimentally with a high degree of statistical significance only a single Standard Model--like Higgs boson is discovered at the LHC, extended Higgs sectors with multiple scalar fields not excluded by combined fits of the data
Externí odkaz:
http://arxiv.org/abs/1705.09624
Publikováno v:
Phys. Part. Nuclei 49 (2018) 1
We study integrable models in the Bianchi I metric case with scalar fields minimally and non-minimally coupled with gravity and the correspondence between their general solutions. Using the model with a minimally coupled scalar field and a constant p
Externí odkaz:
http://arxiv.org/abs/1606.04260