Work

Classically and quantum stable emergent universe from conservation laws

Year: 2016

Type: article

Abstract: It has been recently pointed out by Mithani-Vilenkin [1-4] that certain emergent universe scenarios which are classically stable are nevertheless unstable semiclassically to collapse. Here, we show that there is a class of emergent universes derived from scale invariant two measures theories with spontaneous symmetry breaking (s.s.b) of the scale invariance, which can have both classical stability and do not suffer the instability pointed out by Mithani-Vilenkin towards collapse. We find that this stability is due to the presence of a symmetry in the "emergent phase", which together with the non linearities of the theory, does not allow that the FLRW scale factor to be smaller that a certain minimum value a 0 in a certain protected region.

Source: Journal of Cosmology and Astroparticle Physics

DOI: 10.1088/1475-7516/2016/08/049

Authors: Sergio del Campo, Eduardo I. Guendelman, Ramón Herrera, Pedro Labraña

Institutions: Pontificia Universidad Católica de Valparaíso, Ben-Gurion University of the Negev, University of Bío-Bío

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: bronze

Funder: Pontificia Universidad Católica de Valparaíso

Award: G618188132