Dark Energy May Probe String Theory

Details Dark Energy May Probe String Theory Dark Energy May Probe String Theory

2002-12-13

arxiv.org/abs/hep-th/0212153v1

Physics

High Energy Physics

High Energy Physics - Theory

11 pages, 2 figures, proceedings of the conference Sakharov3, Moscow, Jun 2002

Scientific paper

The problem of dark energy arises due to its self-gravitating properties. Therefore explaining vacuum energy may become a question for the realm of quantum gravity, that can be addressed within string theory context. In this talk I concentrate on a recent, string-inspired model, that relies on nonlinear physics of short-distance perturbation modes, for explaining dark energy without any fine-tuning. Dark energy can be observationally probed by its equation of state, w. Different models predict different types of equations of state and string-inspired ones have a time dependent w(z) as their unique signature. Exploring the link between dark energy and string theory may provide indirect evidence for the latter, by means of precision cosmology data.

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