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
Publicado: 2017
Materias:
Cosmology
Inflation
Quantum cosmology
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03702693_v774_n_p338_Bengochea
http://hdl.handle.net/20.500.12110/paper_03702693_v774_n_p338_Bengochea
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_03702693_v774_n_p338_Bengochea
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spelling paper:paper_03702693_v774_n_p338_Bengochea2023-06-08T15:37:33Z Novel vacuum conditions in inflationary collapse models Cosmology Inflation Quantum cosmology 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. © 2017 The Authors 2017 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03702693_v774_n_p338_Bengochea http://hdl.handle.net/20.500.12110/paper_03702693_v774_n_p338_Bengochea
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Cosmology
Inflation
Quantum cosmology
spellingShingle Cosmology
Inflation
Quantum cosmology
Novel vacuum conditions in inflationary collapse models
topic_facet 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. © 2017 The Authors
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 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03702693_v774_n_p338_Bengochea
http://hdl.handle.net/20.500.12110/paper_03702693_v774_n_p338_Bengochea
_version_ 1768543849491202048

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