TY - JOUR

T1 - Emergent universe from scale invariant two measures theory

AU - Del Campo, Sergio

AU - Guendelman, Eduardo I.

AU - Kaganovich, Alexander B.

AU - Herrera, Ramón

AU - Labraña, Pedro

N1 - Funding Information:
This work was supported by Comision Nacional de Ciencias y Tecnología through FONDECYT Grants 1110230 (S.d.C.), 1090613 (R.H.). Also it was supported by Pontificia Universidad Catolica de Valparaiso through grants 123.787-2007 (S.d.C.) and 123.703-2009 (R.H.). One of us (E.I.G.) would like to thank the astrophysics and cosmology group at the Pontificia Universidad Catolica de Valparaiso for hospitality and the Grant FSM0806 Programa MECE 2 Educacion Superior Fondo de Innovacion Visitas de Especialistas . P.L. is supported by FONDECYT grant No. 11090410 and by Dirección de Investigación de la Universidad del Bío-Bío through Grant No. 096207 1/R .

PY - 2011/5/16

Y1 - 2011/5/16

N2 - The dilaton-gravity sector of a linear in the scalar curvature, scale invariant Two Measures Field Theory (TMT), is explored in detail in the context of closed FRW cosmology and shown to allow stable emerging universe solutions. The model possesses scale invariance which is spontaneously broken due to the intrinsic features of the TMT dynamics. We study the transition from the emerging phase to inflation, and then to a zero cosmological constant phase. We also study the spectrum of density perturbations and the constraints that impose on the parameters of the theory.

AB - The dilaton-gravity sector of a linear in the scalar curvature, scale invariant Two Measures Field Theory (TMT), is explored in detail in the context of closed FRW cosmology and shown to allow stable emerging universe solutions. The model possesses scale invariance which is spontaneously broken due to the intrinsic features of the TMT dynamics. We study the transition from the emerging phase to inflation, and then to a zero cosmological constant phase. We also study the spectrum of density perturbations and the constraints that impose on the parameters of the theory.

KW - Emergent universe

KW - Inflation

UR - http://www.scopus.com/inward/record.url?scp=79955521500&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2011.03.061

DO - 10.1016/j.physletb.2011.03.061

M3 - Article

AN - SCOPUS:79955521500

VL - 699

SP - 211

EP - 216

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

SN - 0370-2693

IS - 4

ER -