Non-tachyonic Scherk-Schwarz compactifications, cosmology and moduli stabilization

Details Non-tachyonic Scherk-Schwarz compactifications, cosmology and moduli stabilization Non-tachyonic Scherk-Schwarz compactifications, cosmology and moduli stabilization

2004-01-26

arxiv.org/abs/hep-th/0401201v2

JHEP 0403:060,2004

Physics

High Energy Physics

High Energy Physics - Theory

36 pages, LaTeX; added references

Scientific paper

10.1088/1126-6708/2004/03/060

It is well-known that Scherk-Schwarz compactifications in string theory have a tachyon in the closed string spectrum appearing for a critical value of a compact radius. The tachyon can be removed by an appropriate orientifold projection in type II strings, giving rise to tachyon-free compactifications. We present explicit examples of this type in various dimensions, including six and four-dimensional chiral examples, with softly broken supersymmetry in the closed sector and non-BPS configurations in the open sector. These vacua are interesting frameworks for studying various cosmological issues. We discuss four-dimensional cosmological solutions and moduli stabilization triggered by nonperturbative effects like gaugino condensation on D-branes and fluxes.

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