Reconstruction of general relativistic cosmological solutions in modified gravity theories
Abstract
We study the special class of exact solutions in cosmological models based on generalized scalar-tensor gravity with nonminimal coupling of a scalar field to the Ricci scalar and to the Gauss-Bonnet scalar in a 4D Friedmann universe corresponding to similar ones in GR. The parameters of cosmological perturbations in such models correspond to the case of Einstein gravity with a high precision. As an example of the proposed approach, we obtain the exact solutions for the power-law and exponential power-law inflation.
- Publication:
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Physical Review D
- Pub Date:
- July 2019
- DOI:
- 10.1103/PhysRevD.100.023511
- arXiv:
- arXiv:1903.03974
- Bibcode:
- 2019PhRvD.100b3511F
- Keywords:
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- General Relativity and Quantum Cosmology
- E-Print:
- 4 figures