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arXiv · hep-th/0401201

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

E. Dudas·C. Timirgaziu
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Abstract

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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E. Dudas, C. Timirgaziu. 2004-02-06. Non-tachyonic Scherk-Schwarz compactifications, cosmology and moduli stabilization. https://doi.org/10.1088/1126-6708%2F2004%2F03%2F060

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