Spacetime correlators of perturbations in slow-roll de Sitter inflation
General Relativity and Quantum Cosmology
2015-06-18 v2 Cosmology and Nongalactic Astrophysics
High Energy Physics - Theory
Abstract
Two-point correlators and self-correlators of primordial perturbations in quasi-de Sitter spacetime backgrounds are considered. For large separations two-point correlators exhibit nearly scale invariance, while for short distances self-correlators need standard renormalization. We study the deformation of two-point correlators to smoothly match the self-correlators at coincidence. The corresponding angular power spectrum is evaluated in the Sachs-Wolfe regime of low multipoles. Scale invariance is maintained, but the amplitude of could change in a non-trivial way.
Keywords
Cite
@article{arxiv.1401.6912,
title = {Spacetime correlators of perturbations in slow-roll de Sitter inflation},
author = {Adrian del Rio and Jose Navarro-Salas},
journal= {arXiv preprint arXiv:1401.6912},
year = {2015}
}
Comments
Clarifying comments and new references added. Misprints corrected