Investigation of the chiral cosmological model of f(R, oR) gravity

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We study modified f (R, OR) gravity which can be reduced to the chiral cosmological model of the special type. Various types of cosmological solutions are considered based on exact analytical solutions, the slow-roll approximation, the superpotential method, the inclusion of additional material fields and reduction multi-field model to single-field one as well. Thus, this paper presents topical methods for analyzing cosmological models based on an effective multi-field interpretation of the proposed modified gravity.

Chiral cosmological model, 𝑓(𝑅, ░𝑅) modified gravity, friedman universe

ΠšΠΎΡ€ΠΎΡ‚ΠΊΠΈΠΉ адрСс: https://sciup.org/142239966

IDR: 142239966   |   Π£Π”Πš: 53.1   |   DOI: 10.17238/issn2226-8812.2023.2.54-67

ИсслСдованиС ΠΊΠΈΡ€Π°Π»ΡŒΠ½ΠΎΠΉ космологичСской ΠΌΠΎΠ΄Π΅Π»ΠΈ f(R, oR) Π³Ρ€Π°Π²ΠΈΡ‚Π°Ρ†ΠΈΠΈ

Π˜Π·ΡƒΡ‡Π°Π΅ΠΌ ΠΌΠΎΠ΄ΠΈΡ„ΠΈΡ†ΠΈΡ€ΠΎΠ²Π°Π½Π½ΡƒΡŽ Π³Ρ€Π°Π²ΠΈΡ‚Π°Ρ†ΠΈΡŽ f (R, OR), которая ΠΌΠΎΠΆΠ΅Ρ‚ Π±Ρ‹Ρ‚ΡŒ свСдСна ΠΊ ΠΊΠΈΡ€Π°Π»ΡŒΠ½ΠΎΠΉ космологичСской ΠΌΠΎΠ΄Π΅Π»ΠΈ ΡΠΏΠ΅Ρ†ΠΈΠ°Π»ΡŒΠ½ΠΎΠ³ΠΎ Ρ‚ΠΈΠΏΠ°. РассмотрСны Ρ€Π°Π·Π»ΠΈΡ‡Π½Ρ‹Π΅ Ρ‚ΠΈΠΏΡ‹ космологичСских Ρ€Π΅ΡˆΠ΅Π½ΠΈΠΉ, основанныС Π½Π° Ρ‚ΠΎΡ‡Π½Ρ‹Ρ… аналитичСских Ρ€Π΅ΡˆΠ΅Π½ΠΈΡΡ…, ΠΏΡ€ΠΈΠ±Π»ΠΈΠΆΠ΅Π½ΠΈΠΈ ΠΌΠ΅Π΄Π»Π΅Π½Π½ΠΎΠ³ΠΎ скатывания, ΠΌΠ΅Ρ‚ΠΎΠ΄Π΅ супСрпотСнциала, Π²ΠΊΠ»ΡŽΡ‡Π΅Π½ΠΈΠΈ Π΄ΠΎΠΏΠΎΠ»Π½ΠΈΡ‚Π΅Π»ΡŒΠ½Ρ‹Ρ… ΠΌΠ°Ρ‚Π΅Ρ€ΠΈΠ°Π»ΡŒΠ½Ρ‹Ρ… ΠΏΠΎΠ»Π΅ΠΉ, Π° Ρ‚Π°ΠΊΠΆΠ΅ Ρ€Π΅Π΄ΡƒΠΊΡ†ΠΈΠΈ ΠΌΠ½ΠΎΠ³ΠΎΠΏΠΎΠ»Π΅Π²ΠΎΠΉ ΠΌΠΎΠ΄Π΅Π»ΠΈ ΠΊ ΠΎΠ΄Π½ΠΎΠΏΠΎΠ»Π΅Π²ΠΎΠΉ. Π’Π°ΠΊΠΈΠΌ ΠΎΠ±Ρ€Π°Π·ΠΎΠΌ, Π² Π΄Π°Π½Π½ΠΎΠΉ ΡΡ‚Π°Ρ‚ΡŒΠ΅ прСдставлСны Π°ΠΊΡ‚ΡƒΠ°Π»ΡŒΠ½Ρ‹Π΅ ΠΌΠ΅Ρ‚ΠΎΠ΄Ρ‹ Π°Π½Π°Π»ΠΈΠ·Π° космологичСских ΠΌΠΎΠ΄Π΅Π»Π΅ΠΉ, основанныС Π½Π° эффСктивной ΠΌΠ½ΠΎΠ³ΠΎΠΏΠΎΠ»Π΅Π²ΠΎΠΉ ΠΈΠ½Ρ‚Π΅Ρ€ΠΏΡ€Π΅Ρ‚Π°Ρ†ΠΈΠΈ ΠΏΡ€Π΅Π΄Π»ΠΎΠΆΠ΅Π½Π½ΠΎΠΉ ΠΌΠΎΠ΄ΠΈΡ„ΠΈΡ†ΠΈΡ€ΠΎΠ²Π°Π½Π½ΠΎΠΉ Π³Ρ€Π°Π²ΠΈΡ‚Π°Ρ†ΠΈΠΈ.

Бписок Π»ΠΈΡ‚Π΅Ρ€Π°Ρ‚ΡƒΡ€Ρ‹ Investigation of the chiral cosmological model of f(R, oR) gravity

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