Cosmology and two-body problem of D-branes

Details Cosmology and two-body problem of D-branes Cosmology and two-body problem of D-branes

2003-10-15

arxiv.org/abs/hep-th/0310142v2

Phys.Rev. D69 (2004) 103506

Physics

High Energy Physics

High Energy Physics - Theory

6 pages, 7 figures, reference added, accepted for publication in PRD

Scientific paper

10.1103/PhysRevD.69.103506

In this paper, we investigate the dynamics and the evolution of the scale factor of a probe Dp-brane which move in the background of source Dp-branes. Action of the probe brane is described by the Born-Infeld action and the interaction with the background R-R field. When the probe brane moves away from the source branes, it expands by power law, whose index depends on the dimension of the brane. If the energy density of the gauge field on the brane is subdominant, the expansion is decelerating irrespective of the dimension of the brane. On the other hand, when the probe brane is a Nambu-Goto brane, the energy density of the gauge field can be dominant, in which case accelerating expansion occurs for $p \leq 4$. The accelerating expansion stops when the brane has expanded sufficiently so that the energy density of the gauge field become subdominant.

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