Non-tachyonic Scherk-Schwarz compactifications, cosmology and moduli stabilization
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.
Cite
@article{arxiv.hep-th/0401201,
title = {Non-tachyonic Scherk-Schwarz compactifications, cosmology and moduli stabilization},
author = {E. Dudas and C. Timirgaziu},
journal= {arXiv preprint arXiv:hep-th/0401201},
year = {2010}
}
Comments
36 pages, LaTeX; added references