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- W2893407790 abstract "Recently a class of inflationary models satisfying the constant rate of roll constraint, $ddot{phi}+(3+alpha)Hdot{phi}=0$, has been studied and compared with the latest cosmological observational data. We consider the broader class of constraints $ddot{phi}+frac{alpha_1}{2}dot{phi}+alpha_2 Hdot{phi}=0$ and find an exact particular solution, without initial singularity, which is an attractor of the dynamics governed by a positive periodic potential $V(phi)=E+ F cos (Omega phi )+G cos (2 Omega phi )$. The spectral index $n_s$ and the tensor to scalar ratio $r$ are consistent with the recent observational data. If we ignore reheating and creation of matter after the end of inflation, this solution develops a period of deceleration and a second period of acceleration, consistent with the experimental results. In addition it yields the value of the Hubble parameter $H_0$ and the value of the redshift for the beginning of the second phase of accelerated expansion in agreement with current data." @default.
- W2893407790 created "2018-10-05" @default.
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- W2893407790 date "2018-09-24" @default.
- W2893407790 modified "2023-09-27" @default.
- W2893407790 title "A new class of inflationary models, that generalizes the constant roll constraint" @default.
- W2893407790 hasPublicationYear "2018" @default.
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