Origin of structure: Statistical characterization of the primordial density fluctuations and the collapse of the wave function

The statistical properties of the primordial density perturbations has been considered in the past decade as a powerful probe of the physical processes taking place in the early universe. Within the inflationary paradigm, the properties of the bispectrum are one of the keys that serves to discrimina...

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Detalles Bibliográficos
Publicado: 2015
Materias:
inflation
non-gaussianity
quantum cosmology
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14757516_v2015_n6_p_Leon
http://hdl.handle.net/20.500.12110/paper_14757516_v2015_n6_p_Leon
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_14757516_v2015_n6_p_Leon
record_format dspace
spelling paper:paper_14757516_v2015_n6_p_Leon2023-06-08T16:17:56Z Origin of structure: Statistical characterization of the primordial density fluctuations and the collapse of the wave function inflation non-gaussianity quantum cosmology The statistical properties of the primordial density perturbations has been considered in the past decade as a powerful probe of the physical processes taking place in the early universe. Within the inflationary paradigm, the properties of the bispectrum are one of the keys that serves to discriminate among competing scenarios concerning the details of the origin of cosmological perturbations. However, all of the scenarios, based on the conventional approach to the so-called ''quantum-to-classical transition'' during inflation, lack the ability to point out the precise physical mechanism responsible for generating the inhomogeneity and anisotropy of our universe starting from and exactly homogeneous and isotropic vacuum state associated with the early inflationary regime. In past works, we have shown that the proposals involving a spontaneous dynamical reduction of the quantum state provide plausible explanations for the birth of said primordial inhomogeneities and anisotropies. In the present manuscript we show that, when considering within the context of such proposals, the characterization of the spectrum and bispectrum turn out to be quite different from those found in the traditional approach, and in particular, some of the statistical features, must be treated in a different way leading to some rather different conclusions. © 2015 IOP Publishing Ltd and Sissa Medialab srl . 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14757516_v2015_n6_p_Leon http://hdl.handle.net/20.500.12110/paper_14757516_v2015_n6_p_Leon
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic inflation
non-gaussianity
quantum cosmology
spellingShingle inflation
non-gaussianity
quantum cosmology
Origin of structure: Statistical characterization of the primordial density fluctuations and the collapse of the wave function
topic_facet inflation
non-gaussianity
quantum cosmology
description The statistical properties of the primordial density perturbations has been considered in the past decade as a powerful probe of the physical processes taking place in the early universe. Within the inflationary paradigm, the properties of the bispectrum are one of the keys that serves to discriminate among competing scenarios concerning the details of the origin of cosmological perturbations. However, all of the scenarios, based on the conventional approach to the so-called ''quantum-to-classical transition'' during inflation, lack the ability to point out the precise physical mechanism responsible for generating the inhomogeneity and anisotropy of our universe starting from and exactly homogeneous and isotropic vacuum state associated with the early inflationary regime. In past works, we have shown that the proposals involving a spontaneous dynamical reduction of the quantum state provide plausible explanations for the birth of said primordial inhomogeneities and anisotropies. In the present manuscript we show that, when considering within the context of such proposals, the characterization of the spectrum and bispectrum turn out to be quite different from those found in the traditional approach, and in particular, some of the statistical features, must be treated in a different way leading to some rather different conclusions. © 2015 IOP Publishing Ltd and Sissa Medialab srl .
title Origin of structure: Statistical characterization of the primordial density fluctuations and the collapse of the wave function
title_short Origin of structure: Statistical characterization of the primordial density fluctuations and the collapse of the wave function
title_full Origin of structure: Statistical characterization of the primordial density fluctuations and the collapse of the wave function
title_fullStr Origin of structure: Statistical characterization of the primordial density fluctuations and the collapse of the wave function
title_full_unstemmed Origin of structure: Statistical characterization of the primordial density fluctuations and the collapse of the wave function
title_sort origin of structure: statistical characterization of the primordial density fluctuations and the collapse of the wave function
publishDate 2015
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14757516_v2015_n6_p_Leon
http://hdl.handle.net/20.500.12110/paper_14757516_v2015_n6_p_Leon
_version_ 1768546037295742976

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