Zobrazeno 1 - 10
of 59
pro vyhledávání: '"Sergey V Chervon"'
Autor:
Sergey V Chervon, Olga G Panina
Publikováno v:
Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, Vol 5, Iss 3, Pp 129-135 (2011)
The application of the method of super-potential to solution of the problems of cosmology with phantom fields is examined. The classes of exact solutions are found and the periods of time with the predominance of dark energy are established.
Externí odkaz:
https://doaj.org/article/ecda65f11e57418b8061c6c8b29cd69b
Publikováno v:
Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, Vol 15, Iss 2, Pp 221-226 (2011)
The application of the method of super-potential to the solution of the problems of cosmology with the tachyon fields is examined. The classes of exact solutions are found and the periods of time with the predominance of dark energy are established.
Externí odkaz:
https://doaj.org/article/bdde80c17437490eac93d8e85259d65d
Autor:
Sergey V Chervon, Yulia A Svistunova
Publikováno v:
Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, Vol 15, Iss 2, Pp 227-234 (2011)
The method to generate exact cosmological solutions in the frame of the sphericallysymmetric non-linear sigma model is offered in the present paper. This method is based on the isometrical embeddings of the target space (non-linear sigma-model fiel
Externí odkaz:
https://doaj.org/article/f7e3dafcee244f469dee40f508d4d8e9
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
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 the corre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::37ed394f5370c1a3ca492190fb38ac3f
https://doi.org/10.1140/epjc/s10052-022-10601-9
https://doi.org/10.1140/epjc/s10052-022-10601-9
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