2024/04/07 by Iraj Safaei, Safaei, Iraj, K. Karami +1 · 2 citations
Biochemistry, Genetics and Molecular Biology · Earth and Planetary Sciences · Physics and Astronomy · #Cosmology and Gravitation Theories #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #Geomagnetism and Paleomagnetism Studies #Geophysics and Gravity Measurements #High Energy Physics - Theory (hep-th)
paper · pdf · doi:10.48550/arxiv.2404.04872
openalex publication_date 2024/04/07 · openalex created_date 2024/04/11 · openalex updated_date 2026/07/28
Here, the quartic inflationary potential V(ϕ)=\fracλ4ϕ4 within a non-canonical framework characterized by a power-law Lagrangian is investigated. We demonstrate that the predictions of this model align with the Planck 2018 observational data. We explore how the predictions of the model depend on the non-canonical parameter α and the number of e-folds N. Notably, the sound speed, non-Gaussianity parameter, scalar spectral index, and tensor-to-scalar ratio are all affected by variations in α. However, the scalar spectral index exhibits a degeneracy with respect to variation in α, which can be broken by incorporating reheating consideration. By applying a combination of theoretical and observational constraints on (r-n\rm s), non-Gaussianity, and reheating parameters, we find that the duration of inflation is constrained to the range 55 ≤ N≤55.7 e-folds for 60 ≤ α≤ 130. Finally, we investigate relic gravitational waves and demonstrate that their energy density spectrum falls within the sensitivity range of gravitational waves detectors for this constrained range of e-folds.