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Cosmological perturbations from multi-field inflation

Published under licence by IOP Publishing Ltd
, , Citation David Langlois 2008 J. Phys.: Conf. Ser. 140 012004 DOI 10.1088/1742-6596/140/1/012004

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1 APC (Astroparticules et Cosmologie), UMR 7164 (CNRS, Universitè Paris 7, CEA, Observatoire de Paris) 10, rue Alice Domon et Lèonie Duquet, 75205 Paris Cedex 13, France

2 Institut d'Astrophysique de Paris (IAP), 98bis Boulevard Arago, 75014 Paris, France

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1742-6596/140/1/012004

Abstract

We briefly review the standard derivation of the spectra of cosmological perturbations in the simplest models of inflation. We then consider models with several scalar fields, described by Lagrangians with an arbitrary dependence on the kinetic terms. We illustrate our general formalism with the case of multi-field DBI inflation.

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10.1088/1742-6596/140/1/012004