Constraining quantum collapse inflationary models with current data: the semiclassical approach

The hypothesis of the self-induced collapse of the inflaton wave function was introduced as a candidate for the physical process responsible for the emergence of inhomogeneity and anisotropy at all scales. In particular, we consider different proposal for the precise form of the dynamics of the infl...

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Detalles Bibliográficos
Autores principales: Piccirilli, María Pía, León, Gabriel, Landau, Susana Judith, Benetti, Micol, Sudarsky, Daniel, Rovero, Adrián Carlos
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 2018
Materias:
Geofísica
Cosmological parameters from CMBR
Inflation
Physics of the early universe
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/97089
https://ri.conicet.gov.ar/11336/85706
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-97089
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Geofísica
Cosmological parameters from CMBR
Inflation
Physics of the early universe
spellingShingle Geofísica
Cosmological parameters from CMBR
Inflation
Physics of the early universe
Piccirilli, María Pía
León, Gabriel
Landau, Susana Judith
Benetti, Micol
Sudarsky, Daniel
Rovero, Adrián Carlos
Constraining quantum collapse inflationary models with current data: the semiclassical approach
topic_facet Geofísica
Cosmological parameters from CMBR
Inflation
Physics of the early universe
description The hypothesis of the self-induced collapse of the inflaton wave function was introduced as a candidate for the physical process responsible for the emergence of inhomogeneity and anisotropy at all scales. In particular, we consider different proposal for the precise form of the dynamics of the inflaton wave function: (i) the GRW-type collapse schemes proposals based on spontaneous individual collapses which generate nonvanishing expectation values of various physical quantities taken as ansatz modifications of the standard inflationary scenario; (ii) the proposal based on a Continuous Spontaneous Localization (CSL) type modification of the Schrödinger evolution of the inflaton wave function, based on a natural choice of collapse operator. We perform a systematic analysis within the semi-classical gravity approximation, of the standing of those models considering a full quasi-de Sitter expansion scenario. We note that the predictions for the Cosmic Microwave Background (CMB) temperature and polarization spectrum differ slightly from those of the standard cosmological model. We also analyze these proposals with a Bayesian model comparison using recent CMB and Baryonic Acoustic Oscillations (BAO) data. Our results show a moderate preference of the joint CMB and BAO data for one of the studied collapse schemes model over the ACDM one, while there is no preference when only CMB data are considered. Additionally, analysis using CMB data provide the same Bayesian evidence for both the CSL and Standard Models, i.e. the data have no preference between the simplicity of the LCDM model and the complexity of the collapse scenario.
format Articulo
Preprint
author Piccirilli, María Pía
León, Gabriel
Landau, Susana Judith
Benetti, Micol
Sudarsky, Daniel
Rovero, Adrián Carlos
author_facet Piccirilli, María Pía
León, Gabriel
Landau, Susana Judith
Benetti, Micol
Sudarsky, Daniel
Rovero, Adrián Carlos
author_sort Piccirilli, María Pía
title Constraining quantum collapse inflationary models with current data: the semiclassical approach
title_short Constraining quantum collapse inflationary models with current data: the semiclassical approach
title_full Constraining quantum collapse inflationary models with current data: the semiclassical approach
title_fullStr Constraining quantum collapse inflationary models with current data: the semiclassical approach
title_full_unstemmed Constraining quantum collapse inflationary models with current data: the semiclassical approach
title_sort constraining quantum collapse inflationary models with current data: the semiclassical approach
publishDate 2018
url http://sedici.unlp.edu.ar/handle/10915/97089
https://ri.conicet.gov.ar/11336/85706
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