α-Attractors and Reheating in a Non-Minimal Inflationary Model

2020/06/24 by R. Shojaee, Raheleh Shojaee, Kourosh Nozari +3 · 2 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Noncommutative and Quantum Gravity Theories #astro-ph.CO #gr-qc #hep-th

paper · pdf · doi:10.1142/s0218271820500777

published as Int. J. Mod. Phys. D, Vol. 29, No. 10, 2050077 (2020) · 17 pages, 7 figures

arxiv created 2021/01/11 · arxiv updated 2022/04/19

Abstract

We study α-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 α 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.

Citations

• NINE-YEAR WILKINSON MICROWAVE ANISOTROPY PROBE ( WMAP ) OBSERVATIONS: COSMOLOGICAL PARAMETER RESULTS

Cited by

• Complex inflaton potentials with nonminimal coupling: Robust inflation and geometric reheating
• Perturbative analysis of the reheating dynamics of α-attractors

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