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arxiv: 1903.03974 · v1 · pith:I2K3PA7Lnew · submitted 2019-03-10 · 🌀 gr-qc

Reconstruction of GR cosmological solutions in modified gravity theories

Igor V. Fomin , Sergey V. Chervon This is my paper
classification 🌀 gr-qc
keywords cosmologicalgravityscalarsolutionsexactmodelspower-lawapproach
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We study the special class of the exact solutions in cosmological models based on the Generalized Scalar-Tensor Gravity with non-minimal coupling of a scalar field to the Ricci scalar and to the Gauss-Bonnet scalar in 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 the example of proposed approach, we obtain the exact solutions for the power-law and exponential power-law inflation.

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  1. Constraining Quintessential Inflation with ACT: A Gauss-Bonnet Gateway

    astro-ph.CO 2026-04 unverdicted novelty 4.0

    Einstein-Gauss-Bonnet corrections with exponential or sech couplings shift quintessential inflation into the 1 sigma ACT region for r and ns, while tanh coupling remains disfavored.