Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/16145

TitlePre-inflationary homogenization of scalar field cosmologies
Author(s)Mena, Filipe C.
Alho, Artur
KeywordsCosmology
Early universe
Inflation
Perturbations
Stability
Issue date2011
PublisherElsevier
JournalPhysics Letters B
Abstract(s)We consider the evolution of covariant and gauge invariant linear density perturbations of scalar fi eld cosmologies using a dynamical systems' approach. We find conditions for which the perturbations decay in time, so that the spacetime approaches a homogeneous solution which inflates, for quadratic and exponential potentials. This pre-inflationary homogenization is found to be stable in the potentials' parameter spaces. Furthermore, in each case, we determine the minimum size of the resultant homogeneous patch and show that, for quadratic potentials, the resulting in inflationary solutions include those with the necessary number of e-folds.
TypeArticle
URIhttp://hdl.handle.net/1822/16145
DOI10.1016/j.physletb.2011.08.044
ISSN0370-2693
Publisher versionhttp://www.sciencedirect.com/science/article/pii/S0370269311009920
Peer-Reviewedyes
AccessRestricted access (UMinho)
Appears in Collections:CMAT - Artigos em revistas com arbitragem / Papers in peer review journals

Files in This Item:
File Description SizeFormat 
letter-homogenization-artur-mar-fmena7-submit.pdf
  Restricted access
1,42 MBAdobe PDFView/Open    Request a copy!

Partilhe no FacebookPartilhe no TwitterPartilhe no DeliciousPartilhe no LinkedInPartilhe no DiggAdicionar ao Google BookmarksPartilhe no MySpacePartilhe no Orkut
Exporte no formato BibTex mendeley Exporte no formato Endnote Adicione ao seu ORCID