تقرير
Integrable modified gravity cosmological models with an additional scalar field
| العنوان: | Integrable modified gravity cosmological models with an additional scalar field |
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| المؤلفون: | Ivanov, Vsevolod R., Vernov, Sergey Yu. |
| المصدر: | Eur. Phys. J. C 81 (2021) 985 |
| سنة النشر: | 2021 |
| المجموعة: | Mathematics Astrophysics General Relativity and Quantum Cosmology Mathematical Physics |
| مصطلحات موضوعية: | General Relativity and Quantum Cosmology, Astrophysics - Cosmology and Nongalactic Astrophysics, Mathematical Physics |
| الوصف: | We consider modified gravity cosmological models that can be transformed into two-field chiral cosmological models by the conformal metric transformation. For the $R^2$ 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. Comment: 11 pages, 3 figures, v2: minor corrections, references are added, to appear in EPJC |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1140/epjc/s10052-021-09792-4 |
| URL الوصول: | http://arxiv.org/abs/2108.10276 |
| رقم الأكسشن: | edsarx.2108.10276 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1140/epjc/s10052-021-09792-4 |
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