$\alpha$-Attractors and Reheating in a Non-Minimal Inflationary Model

Abstract

We study $\alpha$-attractor models with both E-model and T-model potential in an extended Non-Minimal Derivative (NMD) inflation where a canonical scalar field and its derivatives are non-minimally coupled to gravity. We calculate the evolution of perturbations during this regime. Then by adopting inflation potentials of the model we show that in the large N and small $\alpha$ limit, value of the scalar spectral index ns and tensor to scalar ratio r are universal. Next, we study reheating after inflation in this formalism. We obtain some constraints on the model's parameter space by adopting the results with Planck 2018.

17 pages, 7 figures

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• The Unity of Cosmological Attractors
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• Reheating temperature from the CMB
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Cited by in corpus (5)

• Testing scale-invariant inflation against cosmological data
• On the $\alpha$-attractor T-models
• New generalization of the simplest $\alpha$-attractor $T$ model
• Deviation from Slow-Roll Regime in the EGB Inflationary Models with $r\sim N_e^{-1}$
• Complex Inflaton Potentials with Nonminimal Coupling: Robust Inflation and Geometric Reheating