期刊
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
卷 -, 期 3, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1475-7516/2011/03/040
关键词
modified gravity; inflation; cosmological perturbation theory; physics of the early universe
资金
- CNRS-JSPS [24600]
- JSPS [18204024]
- Korea Institute for Advanced Study
- MEXT [19GS0219]
- Grants-in-Aid for Scientific Research [18204024] Funding Source: KAKEN
- National Research Foundation of Korea [52314001] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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.
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