Spacetime correlators of perturbations in slow-roll de Sitter inflation
Articles
Overview
published in
- PHYSICAL REVIEW D Journal
publication date
- April 2014
volume
- 89,(084037)
Digital Object Identifier (DOI)
full text
International Standard Serial Number (ISSN)
- 2470-0010
Electronic International Standard Serial Number (EISSN)
- 2470-0029
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 C(l)could change in a nontrivial way.
Classification
subjects
- Astronomy
- Physics
keywords
- density perturbations; field; fluctuations; universe