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Title: Accelerated universes from type IIA compactifications

We study slow-roll accelerating cosmologies arising from geometric compactifications of type IIA string theory on T{sup 6}/(Z{sub 2}  ×  Z{sub 2}). With the aid of a genetic algorithm, we are able to find quasi-de Sitter backgrounds with both slow-roll parameters of order 0.1. Furthermore, we study their evolution by numerically solving the corresponding time-dependent equations of motion, and we show that they actually display a few e-folds of accelerated expansion. Finally, we comment on their perturbative reliability.
Authors:
; ;  [1]
  1. Institutionen för fysik och astronomi, Uppsala Universitet, Box 803, Uppsala SE-751 08 (Sweden)
Publication Date:
OSTI Identifier:
22370667
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2014; Journal Issue: 03; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ALGORITHMS; COMPACTIFICATION; COSMOLOGY; DE SITTER GROUP; DE SITTER SPACE; EQUATIONS OF MOTION; EVOLUTION; EXPANSION; GEOMETRY; STRING MODELS; STRING THEORY; TIME DEPENDENCE; UNIVERSE