Zobrazeno 1 - 10
of 59
pro vyhledávání: '"Sergey V. Chervon"'
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 82, Iss 7, Pp 1-11 (2022)
Abstract In this work, we consider the models of cosmological inflation based on generalized scalar–tensor theories of gravity with quadratic connection between the Hubble parameter and coupling function. For such a class of the models, we discuss
Externí odkaz:
https://doaj.org/article/5b8c4a83c91f43d9868a73990a349b34
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 78, Iss 4, Pp 1-14 (2018)
Abstract The construction of exact solutions in scalar field inflationary cosmology is of growing interest. In this work, we review the results which have been obtained with the help of one of the most effective methods, viz., the method of generatin
Externí odkaz:
https://doaj.org/article/604fa183a064423ea0d11c23be3d448b
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 80, Iss 4, Pp 1-12 (2020)
European Physical Journal
European Physical Journal
We describe how to reconstruct generalized scalar-tensor gravity (GSTG) theory, which admits exact solutions for physical type of the potentials. Our consideration deals with cosmological inflationary models based on GSTG with non-minimal coupling of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3e214a761214d1db3d0cdcdfbdd013f4
http://link.springer.com/article/10.1140/epjc/s10052-020-7893-y
http://link.springer.com/article/10.1140/epjc/s10052-020-7893-y
Autor:
Sergey V. Chervon, K. A. Bolshakova
Publikováno v:
Gravitation and Cosmology. 26:153-161
We consider a generalization of Higgs inflation, based on cosmology of general relativity (GR), to the case of a two-field model of the tensor-multiscalar theory of gravity (TMS TG). Cosmological solutions are found in the case where a scalar field w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cd68b05e0b6f3e69caa0897e083fe298
https://doi.org/10.1134/s0202289320020048
https://doi.org/10.1134/s0202289320020048
Publikováno v:
Gravitation and Cosmology. 25:205-212
We consider modified f(R) gravity with a kinetic curvature scalar, which can be reduced to a chiral cosmological model of special kind. A detailed derivation is presented for the action of a chiral cosmological model as an equivalent to a gravitation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cbb066d6d60578b0e55124bded3f2742
https://doi.org/10.1134/s0202289319030046
https://doi.org/10.1134/s0202289319030046
Autor:
Igor V. Fomin, Sergey V. Chervon
Publikováno v:
Universe, Vol 6, Iss 199, p 199 (2020)
Universe
Volume 6
Issue 11
Universe
Volume 6
Issue 11
We investigate the ability of the exponential power-law inflation to be a phenomenologically correct model of the early universe. We study General Relativity (GR) scalar cosmology equations in Ivanov&ndash
Salopek&ndash
Bond (or Hamilton&nd
Salopek&ndash
Bond (or Hamilton&nd
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1bc09d261cf01004c34b6eedd8a7a9dc
https://www.mdpi.com/2218-1997/6/11/199
https://www.mdpi.com/2218-1997/6/11/199
Autor:
Sergey V. Chervon, Viktor Zhuravlev
Publikováno v:
Universe, Vol 6, Iss 195, p 195 (2020)
Universe
Volume 6
Issue 11
Universe
Volume 6
Issue 11
We present a qualitative analysis of chiral cosmological model (CCM) dynamics with two scalar fields in the spatially flat Friedman&ndash
Robertson&ndash
Walker Universe. The asymptotic behavior of chiral models is investigated based on the
Robertson&ndash
Walker Universe. The asymptotic behavior of chiral models is investigated based on the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::80088c25943bb6b850caa6381b63ad92
https://www.mdpi.com/2218-1997/6/11/195
https://www.mdpi.com/2218-1997/6/11/195
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 78, Iss 4, Pp 1-14 (2018)
European Physical Journal
European Physical Journal
The construction of exact solutions in scalar field inflationary cosmology is of growing interest. In this work, we review the results which have been obtained with the help of one of the most effective methods, viz., the method of generating functio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2626c90f3435c9660f4a49b370032165
http://link.springer.com/article/10.1140/epjc/s10052-018-5795-z
http://link.springer.com/article/10.1140/epjc/s10052-018-5795-z
Autor:
Sergey V. Chervon, Igor V. Fomin
Publikováno v:
Russian Physics Journal. 60:427-440
A method for generating exact solutions of the equations of the scalar field dynamics in the case of flat Friedmann–Robertson–Walker space on the basis of form-invariant transformations is considered. A method for estimating the divergence of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7a3ffc8aae6795dc5df58660c0d008f7
https://doi.org/10.1007/s11182-017-1091-x
https://doi.org/10.1007/s11182-017-1091-x
Publikováno v:
Physical Review D. 100
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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::20189b30dc55f58e2267260a16f00b0e
https://doi.org/10.1103/physrevd.100.063522
https://doi.org/10.1103/physrevd.100.063522