A generalized non-gaussian consistency relation for single field inflation
Author
dc.contributor.author
Bravo, R.
Author
dc.contributor.author
Mooij, Sander
Author
dc.contributor.author
Palma Quilodrán, Gonzalo
Author
dc.contributor.author
Pradenas Márquez, Bastián
Admission date
dc.date.accessioned
2018-09-25T19:44:18Z
Available date
dc.date.available
2018-09-25T19:44:18Z
Publication date
dc.date.issued
2018-05
Cita de ítem
dc.identifier.citation
Journal of Cosmology and Astroparticle Physics Número: 5 Número de artículo: 024
es_ES
Identifier
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10.1088/1475-7516/2018/05/024
Identifier
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https://repositorio.uchile.cl/handle/2250/151752
Abstract
dc.description.abstract
We show that a perturbed inflationary spacetime, driven by a canonical single
scalar field, is invariant under a special class of coordinate transformations together with
a field reparametrization of the curvature perturbation in co-moving gauge. This transformation
may be used to derive the squeezed limit of the 3-point correlation function of the
co-moving curvature perturbations valid in the case that these do not freeze after horizon
crossing. This leads to a generalized version of Maldacena’s non-Gaussian consistency relation
in the sense that the bispectrum squeezed limit is completely determined by spacetime
diffeomorphisms. Just as in the case of the standard consistency relation, this result may
be understood as the consequence of how long-wavelength modes modulate those of shorter
wavelengths. This relation allows one to derive the well known violation to the consistency
relation encountered in ultra slow-roll, where curvature perturbations grow exponentially
after horizon crossing.
es_ES
Patrocinador
dc.description.sponsorship
Fondecyt Regular project
1171811
CONICYT PFCHA Magister Nacional Scholarship
2016-22161360
CONICYT-PCHA Doctorado Nacional scholarship
2016-21161504
Fondecyt Postdoctoral Grant
3150126