Spotted Inflation

Abstract

We describe new scenarios of generating curvature perturbations when inflaton (curvaton) has significant interactions. We consider a ``spot'', which arises from interactions associated with enhanced symmetric point (ESP) on the trajectory. Our first example uses the spot to induce a gap to the field equation. We observe that the gap in the field equation may cause generation of curvature perturbation if it appears not simultaneous in space. The mechanism is similar to the scenario of inhomogeneous phase transition. Then we observe that the spot interactions may initiate warm inflation in the cold Universe. Creation of cosmological perturbation is discussed in relation to the inflaton dynamics and the modulation associated with the spot interactions.

29pages, 2 figures, footnotes are added for clarification, accepted for publication in JCAP

References in corpus (20)

• Probing String Theory with Modulated Cosmological Fluctuations
• The warm inflationary universe
• Particle production and reheating in the inflationary universe
• Dissipation coefficients for supersymmetric inflatonary models
• Trapped Quintessential Inflation
• Warm inflation dynamics in the low temperature regime
• Modulated Inflation
• Longevity of supersymmetric flat directions
• The nonperturbative decay of SUSY flat directions
• Cosmological perturbations from inhomogeneous preheating and multi-field trapping
• Affleck-Dine condensate, late thermalization and the gravitino problem
• Elliptic Inflation: Generating the curvature perturbation without slow-roll
• Hilltop Curvatons
• Cosmological perturbations from an inhomogeneous phase transition
• NO Curvatons or Hybrid Quintessential Inflation
• Hybrid Curvatons from Broken Symmetry
• Remote Inflation: Hybrid-like inflation without hybrid-type potential
• Evolution of curvature perturbation in generalized gravity theories
• Modulated inflation from kinetic term
• Remote Inflation as hybrid-like sneutrino/MSSM inflation