${\varphi }^4$ inflation is not excluded

Abstract

We present counter examples to the claim that the $\lambda {\varphi }^4$ inflaton potential is excluded by recent cosmological data. Finding counter examples requires that the actually observed primordial fluctuations are generated at the onset of the slow-roll regime of inflation. This set up for the initial conditions is therefore different from the usual scenario of chaotic inflation where inflation starts long before the observed fluctuations are created. The primordial power spectrum of "just enough" chaotic inflation violates scale-invariance in a way consistent with observations.

Extended motivation, matches published version in Phys. Rev. D

References in corpus (20)

• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Formalising the Slow-Roll Approximation in Inflation
• The significance of the largest scale CMB fluctuations in WMAP
• Is the low-l microwave background cosmic?
• Natural Chaotic Inflation in Supergravity
• Suppressing the lower Multipoles in the CMB Anisotropies
• The effective potential and the renormalisation group
• The Uncorrelated Universe: Statistical Anisotropy and the Vanishing Angular Correlation Function in WMAP Years 1-3
• Higher order corrections to primordial spectra from cosmological inflation
• Cosmological parameter estimation and the inflationary cosmology
• 2-Point Correlations in the COBE DMR 4-Year Anisotropy Maps
• Non-Gaussianity, Spectral Index and Tensor Modes in Mixed Inflaton and Curvaton Models
• Punctuated inflation and the low CMB multipoles
• Testing String Theory with CMB
• Primordial fluctuations and cosmological inflation after WMAP 1.0
• Relaxing Constraints on Inflation Models with Curvaton
• Avoiding the blue spectrum and the fine-tuning of initial conditions in hybrid inflation
• The large scale CMB cut-off and the tensor-to-scalar ratio
• Constraints on Inflation Models from Supersymmetry Breakings

Cited by in corpus (22)

• CMB Anomalies after Planck
• Slow-roll inflation with a Gauss-Bonnet correction
• Large-scale alignments from WMAP and Planck
• Kinetic Initial Conditions for Inflation
• Predictions of just-enough inflation
• Non-Minimal Sneutrino Inflation, Peccei-Quinn Phase Transition and non-Thermal Leptogenesis
• Low power on large scales in just enough inflation models
• Pre-slow roll initial conditions: large scale power suppression and infrared aspects during inflation
• Type II Seesaw Higgs Triplet as the inflaton for Chaotic Inflation and Leptogenesis
• Tensor to scalar ratio and large scale power suppression from pre-slow roll initial conditions
• Brane SUSY Breaking and the Gravitino Mass
• Large-Scale Suppression from Stochastic Inflation
• Novel traversable wormhole in General Relativity and Einstein-Scalar-Gauss-Bonnet theory supported by nonlinear electrodynamics
• Observational constraints on the energy scale of inflation
• Pre-Inflationary Relics in the CMB?
• 1/R Correction to Gravity in the Early Universe
• Quantum initial conditions for curved inflating universes
• Computation of the Power Spectrum in Chaotic $1/4\lambda {\varphi }^4$ Inflation
• Entropy Production in the Inflationary Epoch Using the Gouy-Stodola Theorem
• Low-$\ell$ CMB from String-Scale SUSY Breaking?
• Constraint on the Higgs-Dilaton potential via Warm inflation in Two-Time Physics
• Finite inflation in curved space