Effective Field Theory Approach to Cosmological Initial Conditions: Self-Consistency Bounds and Non-Gaussianities

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dc.creatorPorrati, M.
dc.date2004-09-21
dc.date2004-10-19
dc.date.accessioned2026-07-07T04:17:30Z
dc.date.available2026-07-07T04:17:30Z
dc.descriptionEffective Field Theory (EFT) is an efficient method for parametrizing unknown high energy physics effects on low energy data. When applied to time-dependent backgrounds, EFT must be supplemented with initial conditions. In these proceedings, I briefly describe such approach, especially in the case of inflationary, almost-de Sitter backgrounds. I present certain self-consistency constraints that bound the size of possible deviations of the initial state from the standard thermal vacuum. I also estimate the maximum size of non-Gaussianities due to a non-thermal initial state which is compatible with all bounds. These non-Gaussianities can be much larger than those due to nonlinearities in the action describing single-scalar slow roll inflation
dc.descriptionMinor misprints corrected. Contribution to the proceedings of the 13th international seminar on high-energy physics "Quarks 2004," Pushkinskie Gory, Russia, May 24-30, 2004
dc.identifierhttps://arxiv.org/abs/hep-th/0409210
dc.identifierhttp://arxiv.org/abs/hep-th/0409210
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/52778
dc.subjectHigh Energy Physics - Theory
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.titleEffective Field Theory Approach to Cosmological Initial Conditions: Self-Consistency Bounds and Non-Gaussianities
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