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On de Sitter Vacua in Type IIA Orientifold Compactifications

Frank Saueressig·Ulrich Theis·Stefan Vandoren
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Abstract

This letter discusses the orientifold projection of the quantum corrections to type IIA strings compactified on rigid Calabi-Yau threefolds. It is shown that N=2 membrane instanton effects give a holomorphic contribution to the superpotential, while the perturbative corrections enter into the Kahler potential. At the level of the scalar potential the corrections to the Kahler potential give rise to a positive energy contribution similar to adding anti-D3-branes in the KKLT scenario. This provides a natural mechanism to lift an AdS vacuum to a meta-stable dS vacuum.

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Frank Saueressig, Ulrich Theis, Stefan Vandoren. 2005-06-27. On de Sitter Vacua in Type IIA Orientifold Compactifications. https://doi.org/10.1016/j.physletb.2005.11.059

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