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https://hdl.handle.net/1822/16145
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Campo DC | Valor | Idioma |
---|---|---|
dc.contributor.author | Mena, Filipe C. | - |
dc.contributor.author | Alho, Artur | - |
dc.date.accessioned | 2012-01-03T16:45:21Z | - |
dc.date.available | 2012-01-03T16:45:21Z | - |
dc.date.issued | 2011 | - |
dc.identifier.issn | 0370-2693 | por |
dc.identifier.uri | https://hdl.handle.net/1822/16145 | - |
dc.description.abstract | 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. | por |
dc.description.sponsorship | F.C.M. thanks Vincent Moncrief and hospitality from the Department of Physics, Yale University, where this work has been completed. The authors were supported by projects PTDC/MAT/108921/2008 and CERN/FP/116377/2010, by CMAT, Univ. Minho, through FCT plurianual funding and by FCT grants SFRH/BD/48658/2008 and SFRH/BSAB/967/2010. | por |
dc.language.iso | eng | por |
dc.publisher | Elsevier | por |
dc.rights | restrictedAccess | por |
dc.subject | Cosmology | por |
dc.subject | Early universe | por |
dc.subject | Inflation | por |
dc.subject | Perturbations | por |
dc.subject | Stability | por |
dc.title | Pre-inflationary homogenization of scalar field cosmologies | por |
dc.type | article | por |
dc.peerreviewed | yes | por |
dc.relation.publisherversion | http://www.sciencedirect.com/science/article/pii/S0370269311009920 | por |
sdum.publicationstatus | published | por |
oaire.citationStartPage | 537 | por |
oaire.citationEndPage | 542 | por |
oaire.citationIssue | 5 | por |
oaire.citationTitle | Physics Letters B | por |
oaire.citationVolume | 703 | por |
dc.identifier.doi | 10.1016/j.physletb.2011.08.044 | por |
dc.subject.wos | Science & Technology | por |
sdum.journal | Physics Letters B | por |
Aparece nas coleções: | CMAT - Artigos em revistas com arbitragem / Papers in peer review journals |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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letter-homogenization-artur-mar-fmena7-submit.pdf Acesso restrito! | 1,42 MB | Adobe PDF | Ver/Abrir |