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- W4318309293 abstract "The $R+{R}^{2}$ model of gravity with the corresponding shallow potential in the Einstein frame is consistent with the observations. Recently, many efforts have been made to generalize the $R+{R}^{2}$ (Starobinsky) model of inflation or use other shallow potentials to construct a model for the early Universe. We revise the question about the shallow potential. We propose a model in which the Starobinsky model can emerge through a dynamical mechanism. We show that the absence of ghost modes results to constraints on the parameters of the Starobinsky model. We obtain the scalar spectral index and the tensor-to-scalar ratio of the extended model and study the three-point correlation function of the curvature perturbation to estimate the primordial non-Gaussianities of the proposed model." @default.
- W4318309293 created "2023-01-28" @default.
- W4318309293 creator A5002019998 @default.
- W4318309293 creator A5002378077 @default.
- W4318309293 creator A5062447266 @default.
- W4318309293 date "2023-01-27" @default.
- W4318309293 modified "2023-10-11" @default.
- W4318309293 title "Alternative approach to the Starobinsky model for inflation scenarios" @default.
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- W4318309293 doi "https://doi.org/10.1103/physrevd.107.023527" @default.
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