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摘要
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We consider flux compactification of type II string theory with local sources on SU(3)-structure manifolds. By adding pseudo-calibrated anti-Dp-branes wrapped on supersymmetric cycles we generalize all existing models so that the effective d=4, N=1 supergravity now includes a nilpotent multiplet. We present a new dictionary between string theory models and Kahler potential K and superpotential W for these dS supergravities with a nilpotent multiplet and non-linearly realized local supersymmetry. In addition to KKLT and LVS with uplifting D3 over bar -branes, we have now new models with uplifting D5 over bar , D6 over bar , D7 over bar , D9 over bar -branes. The new uplifting contribution to the supergravity potential due to Volkov-Akulov supersymmetry is universal. As one application of our general result, we study classical flux compactifications of type IIA supergravity and find that a previously discovered universal tachyon is now absent.
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7.8
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