$\beta$-exponential inflation

Abstract

An inflationary scenario driven by a slow rolling homogeneous scalar field whose potential $V(\Phi )$ is given by a generalized exponential function is discussed. Within the {\sl slow-roll} approximation we investigate some of the main predictions of the model and compare them with current data from Cosmic Microwave Background and Large-Scale Structure observations. In particular, we show that this single scalar field model admits a wider range of solutions than do conventional exponential scenarios and predicts acceptable values of the scalar spectral index and of the tensor-to-scalar ratio for the remaining number of {\sl e-folds} lying in the interval $N=54\pm 7$ and energy scales of the order of Planck scale. The running of the spectral index is briefly discussed to show that both negative and positive values are predicted by the model here proposed.

4 pages, 3 figures, LaTeX

References in corpus (24)

• Dynamics of dark energy
• The Cosmological Constant and Dark Energy
• Cosmological Imprint of an Energy Component with General Equation of State
• Cosmological Constant - the Weight of the Vacuum
• Quintessence, Cosmic Coincidence, and the Cosmological Constant
• Particle Physics Models of Inflation and the Cosmological Density Perturbation
• Cosmology with a Primordial Scaling Field
• Reconstructing the Inflaton Potential --- an Overview
• How long before the end of inflation were observable perturbations produced?
• A classification of scalar field potentials with cosmological scaling solutions
• Inflation after WMAP3: Confronting the Slow-Roll and Exact Power Spectra with CMB Data
• Nonextensive Thermostatistics and the H-Theorem
• Inflation model constraints from the Wilkinson Microwave Anisotropy Probe three-year data
• A Horizon Ratio Bound for Inflationary Fluctuations
• Scalar-field-dominated cosmology with a transient accelerating phase
• Intermediate inflation in light of the three-year WMAP observations
• Supernovae Ia Constraints on a Time-Variable Cosmological "Constant"
• Slow Roll Reconstruction: Constraints on Inflation from the 3 Year WMAP Dataset
• Implications of a Running Spectral Index for Slow Roll Inflation
• Dark Energy and Some Alternatives: a Brief Overview
• Inflation models after WMAP year three
• Extended Warm Inflation
• Cosmic microwave background and large-scale structure constraints on a simple quintessential inflation model
• A new inflaton model beginning near the Planck epoch

Cited by in corpus (12)

• Encyclopaedia Inflationaris
• An Extended Matter Bounce Scenario: current status and challenges
• WarmSPy: a numerical study of cosmological perturbations in warm inflation
• CMB constraints on $\beta$-exponential inflationary models
• Brane inflation and the robustness of the Starobinsky inflationary model
• Interacting Scalar fields: Dark matter and early dark energy
• Constraining non-minimally coupled $\beta$-exponential inflation with CMB data
• Lower tensor-to-scalar ratio as possible signature of modified gravity
• CMB and LSS constraints on a single-field model of inflation
• Constraining $\beta$-Exponential Inflation with the latest ACT observations
• Constraining tachyonic inflationary β-exponential model with Continuous Spontaneous Localization collapse scheme
• Intermediate Coupling Regime in Dilatonic $f(R,T)$ Inflationary Universe