Simple Bounds from the Perturbative Regime of Inflation

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dc.creatorLeblond, Louis
dc.creatorShandera, Sarah
dc.date2008-02-17
dc.date2008-07-11
dc.date.accessioned2026-07-07T11:56:05Z
dc.date.available2026-07-07T11:56:05Z
dc.descriptionWe examine the conditions under which a perturbative expansion around an inflating background is valid. When inflation is driven by a single field with a general sound speed, we find a lower limit on the sound speed related to the amplitude of the inflationary power spectrum. Generalizing the sound speed constraints to include scale dependence can limit the number of e-folds obtained in the perturbative regime and restrict otherwise apparently viable models. We also show that for models with a low sound speed, eternal inflation cannot occur in the perturbative regime.
dc.description26 pages, 4 figures, v3; added references and clarifications, typos corrected, published version
dc.identifierhttps://arxiv.org/abs/0802.2290
dc.identifierhttp://arxiv.org/abs/0802.2290
dc.identifierJCAP0808:007,2008
dc.identifierdoi:10.1088/1475-7516/2008/08/007
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/205467
dc.subjectHigh Energy Physics - Theory
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Phenomenology
dc.titleSimple Bounds from the Perturbative Regime of Inflation
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