Inflation with a Weyl term, or ghosts at work
Journal Article
·
· Journal of Cosmology and Astroparticle Physics
- APC, UMR 7164 du CNRS, Université Paris 7, 75205 Paris Cedex 13 (France)
- Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502 (Japan)
- Graduate School of Science and Technology, Hirosaki University, Hirosaki 036-8561 (Japan)
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 results are that vector perturbations can no longer be ignored and that scalar modes diverge in the newtonian gauge but remain bounded in the comoving slicing.
- OSTI ID:
- 22275335
- Journal Information:
- Journal of Cosmology and Astroparticle Physics, Vol. 2011, Issue 03; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
- Country of Publication:
- United States
- Language:
- English
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