Eur. Phys. J. C (2016) 76: 326
https://doi.org/10.1140/epjc/s10052-016-4173-y

Regular Article - Theoretical Physics

Geometric back-reaction in pre-inflation from relativistic quantum geometry

¹ Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, Funes 3350, C.P., 7600, Mar del Plata, Argentina
² Instituto de Investigaciones Físicas de Mar del Plata (IFIMAR), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Mar del Plata, Argentina

^* e-mail: mbellini@mdp.edu.ar

Received: 5 May 2016
Accepted: 31 May 2016
Published online: 14 June 2016

Abstract

The pre-inflationary evolution of the universe describes the beginning of the expansion from a static initial state, such that the Hubble parameter is initially zero, but increases to an asymptotic constant value, in which it could achieve a de Sitter (inflationary) expansion. The expansion is driven by a background phantom field. The back-reaction effects at this moment should describe vacuum geometrical excitations, which are studied in detail in this work using relativistic quantum geometry.