Regular Article - Theoretical Physics
Integrable cosmological models with an additional scalar field
Physics Department, Lomonosov Moscow State University, Leninskie Gory 1, 119991, Moscow, Russia
2 Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Leninskie Gory 1, 119991, Moscow, Russia
Accepted: 31 October 2021
Published online: 10 November 2021
We consider modified gravity cosmological models that can be transformed into two-field chiral cosmological models by the conformal metric transformation. For the 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.
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