Inflation with a Weyl term, or ghosts at work

N. Deruelle 1 M. Sasaki 2 Y. Sendouda 3 A. Youssef 3
1 APC - THEORIE
Institut für theoretische Physik, APC - UMR 7164 - AstroParticule et Cosmologie
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 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.


https://hal.archives-ouvertes.fr/hal-00740754
Contributeur : Alina Deniau <>
Soumis le : mercredi 10 octobre 2012 - 18:27:20
Dernière modification le : mardi 11 octobre 2016 - 13:27:29

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N. Deruelle, M. Sasaki, Y. Sendouda, A. Youssef. Inflation with a Weyl term, or ghosts at work. Journal of Cosmology and Astroparticle Physics, Institute of Physics (IOP), 2011, 03, pp.040. <10.1088/1475-7516/2011/03/040>. <hal-00740754>

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