Novel vacuum conditions in inflationary collapse models

Within the framework of inflationary models that incorporate a spontaneous reduction of the wave function for the emergence of the seeds of cosmic structure, we study the effects on the primordial scalar power spectrum by choosing a novel initial quantum state that characterizes the perturbations of...

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Detalles Bibliográficos
Autores principales: Bengochea, Gabriel R., León, Gabriel
Formato: Articulo
Lenguaje:Inglés
Publicado: 2017
Materias:
Ciencias Astronómicas
Cosmology
Inflation
Quantum cosmology
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/87264
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-87264
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
Cosmology
Inflation
Quantum cosmology
spellingShingle Ciencias Astronómicas
Cosmology
Inflation
Quantum cosmology
Bengochea, Gabriel R.
León, Gabriel
Novel vacuum conditions in inflationary collapse models
topic_facet Ciencias Astronómicas
Cosmology
Inflation
Quantum cosmology
description Within the framework of inflationary models that incorporate a spontaneous reduction of the wave function for the emergence of the seeds of cosmic structure, we study the effects on the primordial scalar power spectrum by choosing a novel initial quantum state that characterizes the perturbations of the inflaton. Specifically, we investigate under which conditions one can recover an essentially scale free spectrum of primordial inhomogeneities when the standard Bunch–Davies vacuum is replaced by another one that minimizes the renormalized stress–energy tensor via a Hadamard procedure. We think that this new prescription for selecting the vacuum state is better suited for the self-induced collapse proposal than the traditional one in the semiclassical gravity picture. We show that the parametrization for the time of collapse, considered in previous works, is maintained. Also, we obtain an angular spectrum for the CMB temperature anisotropies consistent with the one that best fits the observational data. Therefore, we conclude that the collapse mechanism might be of a more fundamental character than previously suspected.
format Articulo
Articulo
author Bengochea, Gabriel R.
León, Gabriel
author_facet Bengochea, Gabriel R.
León, Gabriel
author_sort Bengochea, Gabriel R.
title Novel vacuum conditions in inflationary collapse models
title_short Novel vacuum conditions in inflationary collapse models
title_full Novel vacuum conditions in inflationary collapse models
title_fullStr Novel vacuum conditions in inflationary collapse models
title_full_unstemmed Novel vacuum conditions in inflationary collapse models
title_sort novel vacuum conditions in inflationary collapse models
publishDate 2017
url http://sedici.unlp.edu.ar/handle/10915/87264
work_keys_str_mv AT bengocheagabrielr novelvacuumconditionsininflationarycollapsemodels
AT leongabriel novelvacuumconditionsininflationarycollapsemodels
bdutipo_str Repositorios
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