Qualitative analysis of higher-loop string cosmology. II.

Details Qualitative analysis of higher-loop string cosmology. II. Qualitative analysis of higher-loop string cosmology. II.

May 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999afz....42..295s&link_type=abstract

Astrofizika, Tom 42, Vyp. 2, p. 295 - 310

Mathematics

Logic

Cosmology: String Theory

Scientific paper

By using the qualitative methods the homogeneous and isotropic cosmological models with curved spatial sections are investigated within the framework of higher-loop effective string gravity. It is shown that for the radiation-dominated models the corresponding dynamical system is exactly integrable for the general case of dilaton coupling functions. At tree-level the two dimensional phase portraits are presented for both closed and open models. When higher-loop corrections are included the equilibrium points are found and their character is investigated. The results are illustrated for the concrete example. The different cases of dilaton stabilization are considered within the framework of Damour-Polyakov mechanism.

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