Tachyon constant-roll inflation in Randall-Sundrum II cosmology

Abstract

We study inflation in a model with constant second slow-roll parameter $\eta$. In this case, the Hubble expansion rate equation has analytical solutions describing four possible, nontrivial inflation scenarios. The evolution of the inflaton governed by a tachyon field is studied in the framework of the standard and Randall-Sundrum II cosmology. The attractor behavior of the solution is briefly demonstrated. Finally, the calculated values of the parameters $n_{\mathrm{s}}$ and $r$ are compared with observational data.

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Cited by in corpus (1)

• Primordial black hole formation in k-inflation models