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Abstract:

The precise physical mechanism describing the emergence of the seeds of cosmic structure from a perfect isotropic and homogeneous universe has not been fully explained by the standard version of inflationary models. To handle this shortcoming, D. Sudarsky and collaborators have developed a proposal: the self-induced collapse hypothesis. In this scheme, the objective collapse of the inflaton wave function is responsible for the emergence of inhomogeneity and anisotropy at all scales. In previous papers, the proposal was developed with an almost exact de Sitter space-time approximation for the background that led to a perfect scale-invariant power spectrum. In the present article, we consider a full quasi-de Sitter expansion and calculate the primordial power spectrum for three different choices of the self-induced collapse. The consideration of a quasi-de Sitter background allows us to distinguish departures from an exact scale-invariant power spectrum that are due to the inclusion of the collapse hypothesis. These deviations are also different from the prediction of standard inflationary models with a running spectral index. A comparison with the primordial power spectrum and the CMB temperature fluctuation spectrum preferred by the latest observational data is also discussed. From the analysis performed in this work, it follows that most of the collapse schemes analyzed in this paper are viable candidates to explain the present observations of the CMB fluctuation spectrum. © 2015, The Author(s).

Registro:

Documento: Artículo
Título:Inflation including collapse of the wave function: the quasi-de Sitter case
Autor:León, G.; Landau, S.J.; Piccirilli, M.P.
Filiación:Departamento de Física, Universidad de Buenos Aires, Ciudad Universitaria-PabI, Buenos Aires, 1428, Argentina
Departamento de Física, Universidad de Buenos Aires and IFIBA, CONICET, Ciudad Universitaria-PabI, Buenos Aires, 1428, Argentina
Grupo de Astrofísica, Relatividad y Cosmología, Universidad Nacional de La Plata, Paseo del Bosque S/N 1900 La Plata, Pcia de Buenos Aires, Argentina
Año:2015
Volumen:75
Número:8
DOI: http://dx.doi.org/10.1140/epjc/s10052-015-3571-x
Título revista:European Physical Journal C
Título revista abreviado:Eur. Phys. J. C
ISSN:14346044
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14346044_v75_n8_p_Leon

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Citas:

---------- APA ----------
León, G., Landau, S.J. & Piccirilli, M.P. (2015) . Inflation including collapse of the wave function: the quasi-de Sitter case. European Physical Journal C, 75(8).
http://dx.doi.org/10.1140/epjc/s10052-015-3571-x
---------- CHICAGO ----------
León, G., Landau, S.J., Piccirilli, M.P. "Inflation including collapse of the wave function: the quasi-de Sitter case" . European Physical Journal C 75, no. 8 (2015).
http://dx.doi.org/10.1140/epjc/s10052-015-3571-x
---------- MLA ----------
León, G., Landau, S.J., Piccirilli, M.P. "Inflation including collapse of the wave function: the quasi-de Sitter case" . European Physical Journal C, vol. 75, no. 8, 2015.
http://dx.doi.org/10.1140/epjc/s10052-015-3571-x
---------- VANCOUVER ----------
León, G., Landau, S.J., Piccirilli, M.P. Inflation including collapse of the wave function: the quasi-de Sitter case. Eur. Phys. J. C. 2015;75(8).
http://dx.doi.org/10.1140/epjc/s10052-015-3571-x