Loops in reheating and cosmological perturbations

Abstract

We show that in scalar field inflationary models, the loop corrections in reheating corresponding to the decay of the inflaton can cause nontrivial superhorizon evolution of the curvature perturbation. The effect turns out to be prominent when the decay occurs via parametric resonance, even indicating the breakdown of the perturbation theory, as we demonstrate in a specific model.

v4: 24 pages, 1 figure, revtex4-1, minor typos corrected, a reference added, finally to appear in Phys. Rev. D

References in corpus (7)

• Quantum Contributions to Cosmological Correlations II: Can These Corrections Become Large?
• Symmetries and Loops in Inflation
• The constancy of ζin single-clock Inflation at all loops
• The Zeta-Zeta Correlator Is Time Dependent
• Non-Gaussian Correlations Outside the Horizon
• IR Divergence in Inflationary Tensor Perturbations from Fermion Loops
• More on loops in reheating: Non-gaussianities and tensor power spectrum

Cited by in corpus (6)

• Vacuum Fluctuations of a Scalar Field during Inflation: Quantum versus Stochastic Analysis
• Constructing an Inflaton Potential by Mimicking Modified Chaplygin Gas
• Quantum gravity corrections to the conformally coupled scalar self-mass-squared on de Sitter II: kinetic-conformal cross terms
• Quantum gravity corrections to the conformally coupled scalar self-mass-squared on de Sitter background
• Entropy mode loops and cosmological correlations during perturbative reheating
• Adiabatic regularization of functional determinants in cosmology and radiative corrections during inflation