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Enhanced local-type inflationary trispectrum from a non-vacuum initial state

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Enhanced local-type inflationary trispectrum from a non-vacuum initial state

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dc.contributor.author	Agulló, Iván
dc.contributor.author	Navarro Salas, José
dc.contributor.author	Parker, Leonard
dc.date.accessioned	2014-04-01T06:58:19Z
dc.date.available	2014-04-01T06:58:19Z
dc.date.issued	2012
dc.identifier.citation	Agulló, Iván Navarro Salas, José Parker, Leonard 2012 Enhanced local-type inflationary trispectrum from a non-vacuum initial state Journal Of Cosmology And Astroparticle Physics 2012 5 019-1 019-13
dc.identifier.uri	http://hdl.handle.net/10550/33887
dc.description.abstract	We compute the primordial trispectrum for curvature perturbations produced during cosmic inflation in models with standard kinetic terms, when the initial quantum state is not necessarily the vacuum state. The presence of initial perturbations enhances the trispectrum amplitude for configuration in which one of the momenta, say k(3), is much smaller than the others, k(3) << k(1,2,4). For those squeezed con figurations the trispectrum acquires the so-called local form, with a scale dependent amplitude that can get values of order epsilon(k(1)/k(3))(2). This amplitude could be larger than the prediction of the so-called Maldacena consistency relation by a factor as large as 10(6), and could reach the sensitivity of forthcoming observations, even for single-field inflationary models.
dc.relation.ispartof	Journal Of Cosmology And Astroparticle Physics, 2012, vol. 2012, num. 5, p. 019-1-019-13
dc.subject	Gravitació
dc.subject	Cosmologia
dc.subject	Astrofísica
dc.title	Enhanced local-type inflationary trispectrum from a non-vacuum initial state
dc.type	journal article	es_ES
dc.date.updated	2014-04-01T06:58:19Z
dc.identifier.doi	10.1088/1475-7516/2012/05/019
dc.identifier.idgrec	080216
dc.rights.accessRights	open access	es_ES
dc.identifier.url	10.1088/1475-7516/2012/05/019