Natural Double Inflation in Supergravity

Abstract

We propose a natural double inflation model in supergravity. In this model, chaotic inflation first takes place by virtue of the Nambu-Goldstone-like shift symmetry, which guarantees the absence of the exponential factor in the potential for the inflaton field. During chaotic inflation, an initial value of the second inflation (new inflation) is set. In this model, the initial value of new inflation can be adequately far from the local maximum of the potential for new inflation due to the small linear term of the inflaton in the Kähler potential. Therefore, the primordial fluctuations within the present horizon scale may be attributed to both inflations; that is, the first chaotic inflation produces the primordial fluctuations on the large cosmological scales while the second new inflation on the smaller scales. The successive decay of the inflaton for new inflation leads to a reheating temperature low enough to avoid the overproduction of gravitinos in a wide range of the gravitino mass.

13 pages, to appear in Phys. Rev. D

Cited by in corpus (37)

• Inflationary Cosmology
• New models of chaotic inflation in supergravity
• Fibre Inflation: Observable Gravity Waves from IIB String Compactifications
• Cosmology with Nilpotent Superfields
• A review of Axion Inflation in the era of Planck
• Gauge field production in SUGRA inflation: local non-Gaussianity and primordial black holes
• Supergravity based inflation models: a review
• Chaotic inflation and supersymmetry breaking
• Multiple Inflation, Cosmic String Networks and the String Landscape
• Resurrecting Quadratic Inflation in No-Scale Supergravity in Light of BICEP2
• Little Inflatons and Gauge Inflation
• Chaotic hybrid new inflation in supergravity with a running spectral index
• Two-Field Analysis of No-Scale Supergravity Inflation
• Supergravity Inflation with Broken Shift Symmetry and Large Tensor-to-Scalar Ratio
• Generation of cosmological large lepton asymmetry from a rolling scalar field
• Supersymmetric topological inflation model
• D-term chaotic inflation in supergravity
• Primordial Tensor Perturbation in Double Inflationary Scenario with a Break
• The masses of weakly-coupled scalar fields in the early Universe
• Affleck-Dine Baryogenesis and Inflation in Supergravity with Strongly Stabilized Moduli
• Density Fluctuations and Primordial Black Hole Formation in Natural Double Inflation in Supergravity
• Modified Lyth bound and implications of BICEP2 results
• New D-term chaotic inflation in supergravity and leptogenesis
• Chaotic inflation in supergravity and cosmic string production
• The Simple Single Field Inflation Models and the Running of Spectral Index
• Fractional chaotic inflation in the lights of PLANCK and BICEP2
• Dark Energy as Double N-Flation--Observational Predictions
• Quintessentially Flat Scalar Potentials
• Multi-chaotic inflation with and without spectator field
• CMB Spectral $\mu$-Distortion of Multiple Inflation Scenario
• Evidence for Inflation in an Axion Landscape
• Enhanced spectrum of primordial perturbations, galaxy formation and small scale structure
• The Renormalizable Three-Term Polynomial Inflation with Large Tensor-to-Scalar Ratio
• Reheating in Chaotic D-Term Inflation
• Suppression of the large scale curvature perturbation by interacting fluids
• Constraints on the three-fluid model of curvaton decay
• Generic no-scale inflation inspired from string theory compactifications