Antisymmetric field in string gas cosmology

Details Antisymmetric field in string gas cosmology Antisymmetric field in string gas cosmology

2010-07-09

arxiv.org/abs/1007.1521v1

Phys.Rev.D82:126005,2010

Physics

High Energy Physics

High Energy Physics - Theory

23 pages, 12 figures

Scientific paper

10.1103/PhysRevD.82.126005

We study how the introduction of a 2-form field flux modify the dynamics of a T-duality invariant string gas cosmology model of Greene, Kabat and Marnerides. It induces a repulsive potential term in the effective action for the scale factor of the spacial dimensions. Without the 2-form field flux, the universe fails to expand when the pressure due to string modes vanishes. With the presence of a homogeneous 2-form field flux, it propels 3 spacial dimensions to grow into a macroscopic 4 dimensional space-time. We find that it triggers an expansion of a universe away from the oscillating phase around the self-dual radius. We also investigate the effects of a constant 2-form field. We can obtain an expanding 4 dimensional space-time by tuning it at the critical value.

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