Inflationary Dynamics in Einstein-Gauss-Bonnet Gravity Using New Slow-Roll Approximations considering Generalised Reheating

Abstract

The Cosmic Microwave Background (CMB) observations results reported by {\it Planck} satellite suggest a plateau characteristic in the flat potential of the inflaton field is favored to drive the Universe's early acceleration. On that note, Power Law Plateau (PLP) potential has gained a lot of attention. In this study, we demonstrate that implementing this inflationary model in an Einstein-Gauss-Bonnet(EGB) gravity background makes the model compatible with observations while avoiding late-stage thermal inflation which is otherwise unavoidable in a standard scenario. More importantly, we have taken the PLP model as a case study to check the new slow-roll approximations method proposed in \cite{Pozdeeva:2024ihc}. Then we take one step further to check the consequence of generalized reheating in this scenario. Thus opening a new promising window to study inflationary dynamics in EGB gravity.

26 pages, 7 figures, 7 Tables

References in corpus (59)

• Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Parameter Results
• Planck 2018 results. X. Constraints on inflation
• The Standard Model Higgs boson as the inflaton
• Inflation Dynamics and Reheating
• Higgs inflation: consistency and generalisations
• Running Inflation in the Standard Model
• Inflation scenario via the Standard Model Higgs boson and LHC
• Standard Model Higgs boson mass from inflation
• String-inspired Gauss-Bonnet gravity reconstructed from the universe expansion history and yielding the transition from matter dominance to dark energy
• Reheating predictions in single field inflation
• Recent Advances on Inflation
• Higgs inflation
• Warm Little Inflaton
• Swampland Implications of GW170817-compatible Einstein-Gauss-Bonnet Gravity
• Higgs boson, renormalization group, and naturalness in cosmology
• Exploring Cosmic Origins with CORE: Inflation
• Higher Curvature Corrections to Primordial Fluctuations in Slow-roll Inflation
• Power spectra from an inflaton coupled to the Gauss-Bonnet term
• Superconformal Generalization of the Chaotic Inflation Model λϕ^4/4 - ξ/ 2 ϕ^2 R
• Reheating in $R^2$ Palatini inflationary models
• Observational constraints on slow-roll inflation coupled to a Gauss-Bonnet term
• Perturbation, Non-Gaussianity and Reheating in a GB-$\alpha$-Attractor Model
• Inflation with Gauss-Bonnet coupling
• Dynamically induced Planck scale and inflation in the Palatini formulation
• Non-Minimally Coupled Einstein Gauss Bonnet Inflation Phenomenology in View of GW170817
• Inflation with a quartic potential in the framework of Einstein-Gauss-Bonnet gravity
• Palatini-Higgs inflation with non-minimal derivative coupling
• Scale-Invariant Quadratic Gravity and Inflation in the Palatini Formalism
• Constraining Warm Inflation with CMB data
• Gauss-Bonnet Chern-Simons gravitational wave leptogenesis
• Viable Inflationary Models in a Ghost-free Gauss-Bonnet Theory of Gravity
• Probing reheating with primordial spectrum
• Reconstruction of the Scalar Field Potential in Inflationary Models with a Gauss-Bonnet term
• Curing inflationary degeneracies using reheating predictions and relic gravitational waves
• A simple $F(\mathcal{R},\varphi )$ deformation of Starobinsky inflationary model
• Primordial Gravitational Waves Predictions for GW170817-compatible Einstein-Gauss-Bonnet Theory
• Higgs Inflation with a Gauss-Bonnet term in the Jordan Frame
• Renormalization-group inflationary scalar electrodynamics and SU(5) scenarios confronted with Planck2013 and BICEP2 results
• Gauss-Bonnet term corrections in scalar field cosmology
• De Sitter solutions in Einstein-Gauss-Bonnet gravity
• Stability analysis of de Sitter solutions in models with the Gauss-Bonnet term
• Gauss-Bonnet Inflation after Planck2018
• Primordial Black-Hole Dark Matter via Warm Natural Inflation
• Analytic infinite derivative gravity, $R^2$-like inflation, quantum gravity and CMB
• Generalization of cosmological attractor approach to Einstein-Gauss-Bonnet gravity
• Constraints on the Reheating Parameters after Gauss-Bonnet Inflation from the Primordial Gravitational Waves
• A Study of an Einstein Gauss-Bonnet Quintessential Inflationary Model
• Low Scale Higgs Inflation with Gauss-Bonnet Coupling
• A paradigm of warm quintessential inflation and production of relic gravity waves
• Power Law Plateau Inflation Potential In The RS $II$ Braneworld Evading Swampland Conjecture
• Reconstruction of GR cosmological solutions in modified gravity theories
• Possible evolution of a bouncing universe in cosmological models with non-minimally coupled scalar fields
• Modelling Inflation with a Power-law Approach to the Inflationary Plateau
• The paradigm of warm quintessential inflation and spontaneous baryogenesis
• New slow-roll approximations for inflation in Einstein-Gauss-Bonnet gravity
• Primordial black holes in scalar field inflation coupled to the Gauss-Bonnet term with fractional power-law potentials
• Gauss-Bonnet models with cosmological constant and non zero spatial curvature in $D=4$
• Inflation and reheating in quadratic metric-affine gravity with derivative couplings
• Lower tensor to scalar ratio in a SUGRA motivated inflationary potential

Cited by in corpus (6)

• Inflationary Models with Gauss-Bonnet Coupling in Light of ACT Observations
• Probing Reheating Phase via Non-Helical Magnetogenesis and Secondary Gravitational Waves
• Tsallis holographic inflation in $f(R,T)$ gravity: CMB constraints, reheating, and swampland implications
• Confronting Inflation and Reheating with Observations: Improved Predictions
• Implications of pulsar timing arrays for Gauss-Bonnet Inflation
• Hamilton-Jacobi analysis of noncanonical inflation in $f(R,T)$ gravity: Constraints from Planck/ACT data, and theoretical bounds