English

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 CC_{\ell} 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