Integrable cosmological models with an additional scalar field

Abstract We consider modified gravity cosmological models that can be transformed into two-field chiral cosmological models by the conformal metric transformation. For the $$R^2$$ R 2 gravity model with an additional scalar field and the corresponding two-field model with the cosmological constant a...

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Main Authors:	Vsevolod R. Ivanov, Sergey Yu. Vernov
Format:	article
Language:	EN
Published:	SpringerOpen 2021
Subjects:	Astrophysics QB460-466 Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
Online Access:	https://doaj.org/article/38e32076e6404e07af7e2addcf1acb4c
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spelling	oai:doaj.org-article:38e32076e6404e07af7e2addcf1acb4c2021-11-14T12:13:52ZIntegrable cosmological models with an additional scalar field10.1140/epjc/s10052-021-09792-41434-60441434-6052https://doaj.org/article/38e32076e6404e07af7e2addcf1acb4c2021-11-01T00:00:00Zhttps://doi.org/10.1140/epjc/s10052-021-09792-4https://doaj.org/toc/1434-6044https://doaj.org/toc/1434-6052Abstract We consider modified gravity cosmological models that can be transformed into two-field chiral cosmological models by the conformal metric transformation. For the $$R^2$$ R 2 gravity model with an additional scalar field and the corresponding two-field model with the cosmological constant and nonstandard kinetic part of the action, the general solutions have been obtained in the spatially flat FLRW metric. We analyze the correspondence of the cosmic time solutions obtained and different possible evolutions of the Hubble parameters in the Einstein and Jordan frames.Vsevolod R. IvanovSergey Yu. VernovSpringerOpenarticleAstrophysicsQB460-466Nuclear and particle physics. Atomic energy. RadioactivityQC770-798ENEuropean Physical Journal C: Particles and Fields, Vol 81, Iss 11, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Astrophysics QB460-466 Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
spellingShingle	Astrophysics QB460-466 Nuclear and particle physics. Atomic energy. Radioactivity QC770-798 Vsevolod R. Ivanov Sergey Yu. Vernov Integrable cosmological models with an additional scalar field
description	Abstract We consider modified gravity cosmological models that can be transformed into two-field chiral cosmological models by the conformal metric transformation. For the $$R^2$$ R 2 gravity model with an additional scalar field and the corresponding two-field model with the cosmological constant and nonstandard kinetic part of the action, the general solutions have been obtained in the spatially flat FLRW metric. We analyze the correspondence of the cosmic time solutions obtained and different possible evolutions of the Hubble parameters in the Einstein and Jordan frames.
format	article
author	Vsevolod R. Ivanov Sergey Yu. Vernov
author_facet	Vsevolod R. Ivanov Sergey Yu. Vernov
author_sort	Vsevolod R. Ivanov
title	Integrable cosmological models with an additional scalar field
title_short	Integrable cosmological models with an additional scalar field
title_full	Integrable cosmological models with an additional scalar field
title_fullStr	Integrable cosmological models with an additional scalar field
title_full_unstemmed	Integrable cosmological models with an additional scalar field
title_sort	integrable cosmological models with an additional scalar field
publisher	SpringerOpen
publishDate	2021
url	https://doaj.org/article/38e32076e6404e07af7e2addcf1acb4c
work_keys_str_mv	AT vsevolodrivanov integrablecosmologicalmodelswithanadditionalscalarfield AT sergeyyuvernov integrablecosmologicalmodelswithanadditionalscalarfield
_version_	1718429340248571904

Integrable cosmological models with an additional scalar field

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