TY - JOUR
T1 - Stable Emergent Universe from Conservation Laws
AU - Labrana, P.
AU - Del Campo, S.
AU - Herrera, R.
AU - Guendelman, E.
N1 - Funding Information:
We thank Professor Alexander Vilenkin for suggesting and encouraging us to study the problem of the quantum stability of the emergent universe scenario and for multiple discussions on this subject. This work was supported by Comisión Nacional de Ciencias y Tecnología through FONDECYT Grants 1110230 (SdC), 1130628 (RH). Also it was supported by Pontificia Universidad Católica de Valparáıso through grants 123.787-2007 (SdC) and 123724 (RH). One of us (E.I.G) would like to thank the astrophysics and cosmology group at the Pontificia Universidad Católica de Valparáıso and the Frankfurt Institute of Advanced Studies of Frankfurt University for hospitality. P. L. is supported by Dirección de Investigación de la Universidad del Bío-Bío through Grants N0 166907 2/R, and GI 150407/VC.
Publisher Copyright:
© Published under licence by IOP Publishing Ltd.
PY - 2018/6/25
Y1 - 2018/6/25
N2 - In this paper, based on JCAP 1608 (2016) 049, we show that there is a class of emergent universes models, 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 [4, 3, 2, 5]. 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.
AB - In this paper, based on JCAP 1608 (2016) 049, we show that there is a class of emergent universes models, 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 [4, 3, 2, 5]. 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.
UR - http://www.scopus.com/inward/record.url?scp=85050144148&partnerID=8YFLogxK
U2 - 10.1088/1742-6596/1043/1/012026
DO - 10.1088/1742-6596/1043/1/012026
M3 - Conference article
AN - SCOPUS:85050144148
SN - 1742-6588
VL - 1043
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
IS - 1
M1 - 012026
T2 - 20th Chilean Physics Symposium
Y2 - 30 November 2016 through 2 December 2016
ER -