Cosmological constraints on nonstandard inflationary quantum collapse models

We briefly review an important shortcoming-unearthed in previous works-of the standard version of the inflationary model for the emergence of the seeds of cosmic structure. We consider here some consequences emerging from a proposal inspired on ideas of Penrose and Diósi about a quantum-gravity indu...

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Publicado: 2012
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15507998_v85_n12_p_Landau
http://hdl.handle.net/20.500.12110/paper_15507998_v85_n12_p_Landau
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling paper:paper_15507998_v85_n12_p_Landau2023-06-08T16:22:25Z Cosmological constraints on nonstandard inflationary quantum collapse models We briefly review an important shortcoming-unearthed in previous works-of the standard version of the inflationary model for the emergence of the seeds of cosmic structure. We consider here some consequences emerging from a proposal inspired on ideas of Penrose and Diósi about a quantum-gravity induced reduction of the wave function, which has been put forward to address the shortcomings, arguing that its effect on the inflaton field is what can lead to the emergence of the seeds of cosmic structure. The proposal leads to a deviation of the primordial spectrum from the scale-invariant Harrison-Zel'dovich one, and consequently, to a different CMB power spectrum. We perform statistical analyses to test two quantum collapse schemes with recent data from the CMB, including the 7-yr release of WMAP and the matter power spectrum measured using LRGs by the Sloan Digital Sky Survey. Results from the statistical analyses indicate that several collapse models are compatible with CMB and LRG data, and establish constraints on the free parameters of the models. The data put no restriction on the timescale for the collapse of the scalar field modes. © 2012 American Physical Society. 2012 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15507998_v85_n12_p_Landau http://hdl.handle.net/20.500.12110/paper_15507998_v85_n12_p_Landau
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description We briefly review an important shortcoming-unearthed in previous works-of the standard version of the inflationary model for the emergence of the seeds of cosmic structure. We consider here some consequences emerging from a proposal inspired on ideas of Penrose and Diósi about a quantum-gravity induced reduction of the wave function, which has been put forward to address the shortcomings, arguing that its effect on the inflaton field is what can lead to the emergence of the seeds of cosmic structure. The proposal leads to a deviation of the primordial spectrum from the scale-invariant Harrison-Zel'dovich one, and consequently, to a different CMB power spectrum. We perform statistical analyses to test two quantum collapse schemes with recent data from the CMB, including the 7-yr release of WMAP and the matter power spectrum measured using LRGs by the Sloan Digital Sky Survey. Results from the statistical analyses indicate that several collapse models are compatible with CMB and LRG data, and establish constraints on the free parameters of the models. The data put no restriction on the timescale for the collapse of the scalar field modes. © 2012 American Physical Society.
title Cosmological constraints on nonstandard inflationary quantum collapse models
spellingShingle Cosmological constraints on nonstandard inflationary quantum collapse models
title_short Cosmological constraints on nonstandard inflationary quantum collapse models
title_full Cosmological constraints on nonstandard inflationary quantum collapse models
title_fullStr Cosmological constraints on nonstandard inflationary quantum collapse models
title_full_unstemmed Cosmological constraints on nonstandard inflationary quantum collapse models
title_sort cosmological constraints on nonstandard inflationary quantum collapse models
publishDate 2012
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15507998_v85_n12_p_Landau
http://hdl.handle.net/20.500.12110/paper_15507998_v85_n12_p_Landau
_version_ 1768545993380331520

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