Imprint of spatial curvature on inflation power spectrum

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dc.contributor.authorMassó, Eduard
dc.contributor.authorMohanty, Subhendra
dc.contributor.authorNautiyal, Akhilesh
dc.contributor.authorZsembinszki, Gabriel
dc.date.accessioned2016-03-03T11:26:12Z
dc.date.available2016-03-03T11:26:12Z
dc.date.issued2008
dc.description.abstractIf the universe had a large curvature before inflation there is a deviation from the scale invariant perturbations of the inflaton at the beginning of inflation. This may have some effect on the CMB anisotropy at large angular scales. We calculate the density perturbations for both open and closed universe cases using the Bunch-Davies vacuum condition on the initial state. We use our power spectrum to calculate the temperature anisotropy spectrum and compare the results with the WMAP three year data. We find that our power spectrum gives a lower quadrupole anisotropy when Ω − 1 > 0, but matches the temperature anisotropy calculated from the standard Ratra-Peebles power spectrum at large l. The determination of spatial curvature from temperature anisotropy data is not much affected by the different power spectra which arise from the choice of different boundary conditions for the inflaton perturbation .ca_ES
dc.description.sponsorshipThe work of E. M. and G. Z. is partially supported by Spanish Grant No. FPA-2005-05904, by Catalan DURSI Grant No. 2005SGR00916, and by EU 6th Framework Marie Curie Research and Training network UniverseNet (MRTN-CT-2006-035863). G. Z. is also supported by DURSI under Grant No. 2003FI00138. S. M. is supported by the Generalitat de Catalunya under the program PIV1- 2005.ca_ES
dc.identifier.doihttps://doi.org/10.1103/PhysRevD.78.043534
dc.identifier.idgrec022190
dc.identifier.issn0556-2821
dc.identifier.urihttp://hdl.handle.net/10459.1/56671
dc.language.isoengca_ES
dc.publisherAmerican Physical Societyca_ES
dc.relation.isformatofReproducció del document publicat a https://doi.org/10.1103/PhysRevD.78.043534ca_ES
dc.relation.ispartofPhysical Review D, 2008, vol. 78, núm. 4, p. 043534ca_ES
dc.rights(c) American Physical Society, 2008ca_ES
dc.rights.accessRightsinfo:eu-repo/semantics/openAccessca_ES
dc.titleImprint of spatial curvature on inflation power spectrumca_ES
dc.typearticleca_ES
dc.type.versionpublishedVersionca_ES
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