Whipped inflation
arXiv:1404.0360 · doi:10.1103/PhysRevLett.113.071301
Abstract
Motivated by the idea that inflation occurs at the GUT symmetry breaking scale, in this paper we construct a new class of large field inflaton potentials where the inflaton starts with a power law potential; after initial period of relative fast roll that lasts until after a few e-folds inside the horizon, it transits to the attractor of the slow roll part of the potential with a lower power. Due to the initial fast roll stages of inflation, we find a suppression in scalar primordial power at large scales and at the same time the choice of the potential can provide us a tensor primordial spectrum with high amplitude. This suppression in scalar power with a large tensor-to-scalar ratio helps us to reconcile the Planck and BICEP2 data in a single framework. We find that a transition from a cubic to quadratic form of inflaton potential generates an appropriate suppression in power of scalar primordial spectrum that provides significant improvement in fit compared to power law model when compared with Planck and BICEP2 data together. We calculate the extent of non-Gaussianity, specifically, the bispectrum for the best fit potential and show that it is consistent with Planck bispectrum constraints.
5 pages, 2 figures and 1 table; matches final version published in PRL
References in corpus (37)
- Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Parameter Results
- Efficient Computation of CMB anisotropies in closed FRW models
- Cosmological parameters from CMB and other data: a Monte-Carlo approach
- Non-Gaussian features of primordial fluctuations in single field inflationary models
- BICEP2 I: Detection Of B-mode Polarization at Degree Angular Scales
- First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Implications for Inflation
- Primordial Non-Gaussianities from Inflation Models
- Suppressing the lower Multipoles in the CMB Anisotropies
- Horizon crossing and inflation with large η
- Large Non-Gaussianities in Single Field Inflation
- Gauge invariant MSSM inflaton
- Generation and Characterization of Large Non-Gaussianities in Single Field Inflation
- Reconstructing the primordial power spectrum
- MSSM flat direction inflation: slow roll, stability, fine tunning and reheating
- Improved Estimates of Cosmological Perturbations
- Primordial power spectrum from WMAP
- Punctuated inflation and the low CMB multipoles
- CMB polarization features from inflation versus reionization
- New Universal Local Feature in the Inflationary Perturbation Spectrum
- New Constraints on Oscillations in the Primordial Spectrum of Inflationary Perturbations
- Primordial features due to a step in the inflaton potential
- A Toy Model for Open Inflation
- CMB in Open Inflation
- BINGO: A code for the efficient computation of the scalar bi-spectrum
- The tensor-to-scalar ratio in punctuated inflation
- Fingerprints of Galactic Loop I on the Cosmic Microwave Background
- Features in the Primordial Spectrum from WMAP: A Wavelet Analysis
- CMB Imprints of a Pre-Inflationary Climbing Phase
- Is a step in the primordial spectral index favored by CMB data ?
- The scalar bi-spectrum in the Starobinsky model: The equilateral case
- Reconstruction of the primordial power spectrum of curvature perturbations using multiple data sets
- Suppressing the impact of a high tensor-to-scalar ratio on the temperature anisotropies
- Reconstruction of broad features in the primordial spectrum and inflaton potential from Planck
- Ruling out the power-law form of the scalar primordial spectrum
- Primordial power spectrum: a complete analysis with the WMAP nine-year data
- Steps to Reconcile Inflationary Tensor and Scalar Spectra
- Tensor to scalar ratio and large scale power suppression from pre-slow roll initial conditions
Cited by in corpus (58)
- Planck 2018 results. X. Constraints on inflation
- Planck 2013 results. XXII. Constraints on inflation
- Inflation with a constant rate of roll
- Features and New Physical Scales in Primordial Observables: Theory and Observation
- Blue Tensor Spectrum from Particle Production during Inflation
- The Science of the Einstein Telescope
- Chaotic Inflation in Supergravity after Planck and BICEP2
- Overshooting, Critical Higgs Inflation and Second Order Gravitational Wave Signatures
- Compatibility of Planck and BICEP2 in the Light of Inflation
- Neutrinos and dark energy after Planck and BICEP2: data consistency tests and cosmological parameter constraints
- Generating primordial features at large scales in two field models of inflation
- Ruling out the power-law form of the scalar primordial spectrum
- Primordial features and Planck polarization
- Pre-inflationary primordial perturbations
- Constraints on inflation with LSS surveys: features in the primordial power spectrum
- Alleviating the tension at low multipole through Axion Monodromy
- Effects of discontinuities of the derivatives of the inflaton potential
- Comparing multi-field primordial feature models with the Planck data
- Inflation After False Vacuum Decay: New Evidence from BICEP2
- Probing features in inflaton potential and reionization history with future CMB space observations
- Probing features in the primordial perturbation spectrum with large-scale structure data
- Scalar suppression on large scales in open inflation
- Large Slow Roll Parameters in Single Field Inflation
- On the challenges in the choice of the non-conformal coupling function in inflationary magnetogenesis
- Inflationary generalized Chaplygin gas and dark energy in the light of the Planck and BICEP2 experiments
- Primordial features from ekpyrotic bounces
- Constraints on features in the inflationary potential from future Euclid data
- Power Spectrum of Inflationary Attractors
- Inflation that runs naturally: Gravitational waves and suppression of power at large and small scales
- Nonminimal coupling inflation with constant slow roll
- CMB anomalies and the effects of local features of the inflaton potential
- Negative running prevents eternal inflation
- New model of axion monodromy inflation and its cosmological implications
- High-resolution CMB bispectrum estimator with flexible modal basis
- Effects of local features of the inflaton potential on the spectrum and bispectrum of primordial perturbations
- Bayesian evidence of non-standard inflation: isocurvature perturbations and running spectral index
- CMB-S4 forecast on the primordial non-Gaussianity parameter of feature models
- Large Scale Suppression of Scalar Power on a Spatial Condensation
- Ambiguity in running spectral index with an extra light field during inflation
- Circumventing the challenges in the choice of the non-conformal coupling function in inflationary magnetogenesis
- On the constant roll complex scalar field inflationary models
- New Horizons in Cosmology with Spectral Distortions of the Cosmic Microwave Background
- Jump in fluid properties of inflationary universe to reconcile scalar and tensor spectra
- Understanding large scale CMB anomalies with the generalized non-minimal derivative coupling during inflation
- Running of scalar spectral index in multi-field inflation
- Investigating the Origin of CMB Large-Scale Features Using LiteBIRD and CMB-S4
- Naturally large tensor-to-scalar ratio in inflation
- Suppression of scalar power on large scales and associated bispectra
- Amplifying quantum discord during inflationary magnetogenesis through violation of parity
- Deflation of Vacuum Energy During Inflation Due to Bulk-Brane Interaction
- Log-periodic gravitational-wave background beyond Einstein gravity
- Unique contributions to the scalar bispectrum in `just enough inflation'
- The scalar-scalar-tensor inflationary three-point function in the axion monodromy model
- Reanalyzing the upper limit on the tensor-to-scalar perturbation ratio r_T in a quartic potential inflationary model
- Inflation Story: slow-roll and beyond
- Investigating the Constraints on Primordial Features with Future Cosmic Microwave Background and Galaxy Surveys
- Probing inflation with large-scale structure data: the contribution of information at small scales
- Cross-tests of CMB features in the primordial spectra