Accelerated universes from type IIA compactifications

Journal Article · Sat Mar 01 00:00:00 EST 2014 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2014/03/003· OSTI ID:22370667

Blåbäck, Johan; Danielsson, Ulf; Dibitetto, Giuseppe ^[1]

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1. Institutionen för fysik och astronomi, Uppsala Universitet, Box 803, Uppsala SE-751 08 (Sweden)

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.

• OSTI ID: 22370667
• Journal Information: Journal of Cosmology and Astroparticle Physics, Vol. 2014, Issue 03; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

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