qualitative analysis of string cosmology with loop corrections. II

Details qualitative analysis of string cosmology with loop corrections. II qualitative analysis of string cosmology with loop corrections. II

Apr 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999ap.....42..222s&link_type=abstract

Astrophysics, Volume 42, Issue 2, pp.222-233

Astronomy and Astrophysics

Astrophysics

Scientific paper

Homogeneous and Isotropic cosmological models of effective string theory with a curved space are investigated by the methods of the qualitative theory of dynamical systems. It is shown that for radiation-dominated models, tthe corresponding dynamical system can be integrated exactly for the general case of dilaton coupling functions. Models in the tree approximation with a two-dimensional phase space are considered separately. In the general case of loop corrections, all possible stationary points are found and their character is determined. The results are illustrated using a specific example. Various cases of fixing the dilaton within the framework of the Damour-Polyakov mechanism are considered.

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