https://doi.org/10.1140/epjc/s10052-021-09842-x
Regular Article - Theoretical Physics
Emergent universe revisited through the CSL theory
1
Instituto de Astronomía y Física del Espacio (IAFE), CONICET-Universidad de Buenos Aires, 1428, Buenos Aires, Argentina
2
Grupo de Cosmología, Facultad de Ciencias Astronómicas y Geofísicas, Universidad Nacional de La Plata, Paseo del Bosque S/N, 1900, La Plata, Argentina
3
CONICET, Godoy Cruz 2290, 1425, Ciudad Autónoma de Buenos Aires, Argentina
Received:
4
August
2021
Accepted:
16
November
2021
Published online:
1
December
2021
In this work we analyze how the spectrum of primordial scalar perturbations is modified, within the emergent universe scenario, when a particular version of the Continuous Spontaneous Localization (CSL) model is incorporated as the generating mechanism of initial perturbations, providing also an explanation to the quantum-to-classical transition of such perturbations. On the other hand, a phase of super-inflation, prior to slow-roll inflation, is a characteristic feature of the emergent universe hypothesis. In recent works, it was shown that the super-inflation phase could generically induce a suppression of the temperature anisotropies of the CMB at large angular scales. We study here under what conditions the CSL maintains or modifies these characteristics of the emergent universe and their compatibility with the CMB observations.
© The Author(s) 2021
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