Cosmological acceleration from a gas of strings

Details Cosmological acceleration from a gas of strings Cosmological acceleration from a gas of strings

2009-07-08

arxiv.org/abs/0907.1342v1

Nucl.Phys.Proc.Suppl.194:218-223,2009

Physics

High Energy Physics

High Energy Physics - Theory

6 pages, 2 figures. Proceedings of the GGI Dark Matter and Dark Energy conference

Scientific paper

10.1016/j.nuclphysbps.2009.07.03

In string gas cosmology, the extra dimensions of the underlying theory are kept at a microscopic scale by a gas of strings. In the matter-dominated era, however, dust pressure can lead to oscillations of the extra dimensions and to acceleration in the three visible dimensions, even with a vanishing cosmological term. We review the resulting oscillating expansion history, that provides an acceptable fit to the observed accelerated expansion of the Universe.

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