Publication : t03/183

Finite volume effects for non-Gaussian multi-field inflationary models

Bernardeau F. (CEA, DSM, SPhT (Service de Physique Théorique), F-91191 Gif-sur-Yvette, FRANCE)
Uzan J.-P. (Laboratoire de Physique Théorique (LPT), CNRS, UMR 8627, Université de Paris-Sud XI, F-91405 Orsay, France)
Models of multi-field inflation exhibiting primordial non-Gaussianity have recently been introduced. This is the case in particular if the fluctuations of a light field scalar field, transverse to the inflaton direction, with quartic coupling can be transferred to the metric fluctuations. So far in those calculations only the ensemble statistical properties have been considered. We explore here how finite volume effects could affect those properties. We show that the expected non-Gaussian properties survive at a similar level when the finite volume effects are taken into account and also find that they can skew the metric distribution even though the ensemble distribution is symmetric.
Année de publication : 2004
Revue : Phys. Rev. D 70 043533 (2004)
DOI : 10.1103/PhysRevD.70.043533
Preprint : arXiv:astro-ph/0311421
Lien :
PACS : 98.80.-q, 04.20.-q, 02.040.Pc/98.80.Cq, 04.62.+v
Numéro Exterieur : Code Bibliographique ADS : 2004PhRvD..70d3533B
Langue : Anglais

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