Inflation with a Weyl term, or ghosts at work
General Relativity and Quantum Cosmology
2011-03-31 v1 Cosmology and Nongalactic Astrophysics
High Energy Physics - Phenomenology
High Energy Physics - Theory
Abstract
In order to assess the role of ghosts in cosmology, we study the evolution of linear cosmological perturbations during inflation when a Weyl term is added to the action. Our main result is that vector perturbations can no longer be ignored and that scalar modes diverge in the newtonian gauge but remain bounded in the comoving slicing.
Keywords
Cite
@article{arxiv.1012.5202,
title = {Inflation with a Weyl term, or ghosts at work},
author = {Nathalie Deruelle and Misao Sasaki and Yuuiti Sendouda and Ahmed Youssef},
journal= {arXiv preprint arXiv:1012.5202},
year = {2011}
}
Comments
14 pages, 4 figures