Non-standard kinetic term as a natural source of non-Gaussianity

Abstract

We consider reheating after inflation with a non-standard kinetic term. We show that the difference in the kinetic term in different Hubble patches inherited from the long-wavelength moduli inhomogeneities may generate a significant level of non-Gaussianity after inflation.

arXiv comment11pages, no figure, latex2e, added references, to appear in JHEP

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• The Trispectrum in the Multi-brid Inflation
• Cosmological perturbations from an inhomogeneous phase transition
• Evolution of the curvature perturbations during warm inflation
• Oscillons during Dirac-Born-Infeld Preheating
• Delta-N formalism for the evolution of the curvature perturbations in generalized multi-field inflation
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• Free light fields can change the predictions of hybrid inflation
• Evolution of curvature perturbation in generalized gravity theories
• Remote Inflation as hybrid-like sneutrino/MSSM inflation
• Curvatons and inhomogeneous scenarios with deviation from slow-roll