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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2024, Volume 119, Issue 5, Pages 330–335
DOI: https://doi.org/10.31857/S1234567824050021 (Mi jetpl7167) 		 
ASTROPHYSICS AND COSMOLOGY

Perturbations in Horndeski theory above anisotropic cosmological background

S. A. Mironovabc, A. M. Shtennikovada

a Institute for Nuclear Research, Russian Academy of Sciences, Moscow, 117312 Russia
b Institute for Theoretical and Mathematical Physics, Moscow State University, Moscow, 119991 Russia
c National Research Center Kurchatov Institute, Moscow, 123182 Russia
d Department of Particle Physics and Cosmology, Faculty of Physics, Moscow State University, Moscow, 119991 Russia
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DOI: https://doi.org/10.31857/S1234567824050021
Abstract: Considering an anisotropic cosmological background is an interesting and simultaneously challenging problem of theoretical physics, since we not only assume a high degree of anisotropy in the early stages of the Universe, but also observe it to a small degree until now. In this paper we have constructed the unconstrained action for the perturbations above Bianchi I type background in the most general scalar-tensor theory of gravity, the Horndeski theory, and evaluate the effect of the deviation from the anisotropic background on the previously established stable solution obtained in previous works.
Funding agency Grant number
Russian Science Foundation 19-12-00393
This work was supported by the Russian Science Foundation, project no. 19-12-00393.
Received: 01.07.2023
Revised: 27.01.2024
Accepted: 28.01.2024
English version:
Journal of Experimental and Theoretical Physics Letters, 2024, Volume 119, Issue 5, Pages 339–344
DOI: https://doi.org/10.1134/S002136402360204X
Bibliographic databases:
Document Type: Article
Language: Russian
Citation: S. A. Mironov, A. M. Shtennikova, “Perturbations in Horndeski theory above anisotropic cosmological background”, Pis'ma v Zh. Èksper. Teoret. Fiz., 119:5 (2024), 330–335; JETP Letters, 119:5 (2024), 339–344
Citation in format AMSBIB
\Bibitem{MirSht24}
\by S.~A.~Mironov, A.~M.~Shtennikova
\paper Perturbations in Horndeski theory above anisotropic cosmological background
\jour Pis'ma v Zh. \`Eksper. Teoret. Fiz.
\yr 2024
\vol 119
\issue 5
\pages 330--335
\mathnet{http://mi.mathnet.ru/jetpl7167}
\crossref{https://doi.org/10.31857/S1234567824050021}
\edn{https://elibrary.ru/BMTZMQ}
\transl
\jour JETP Letters
\yr 2024
\vol 119
\issue 5
\pages 339--344
\crossref{https://doi.org/10.1134/S002136402360204X}
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