𝔖 Bobbio Scriptorium
✦   LIBER   ✦

On classical de Sitter vacua in string theory

✍ Scribed by T. Wrase; M. Zagermann

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
145 KB
Volume
58
Category
Article
ISSN
0015-8208

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

We review the prospect of obtaining tree‐level de Sitter (dS) vacua and slow‐roll inflation models in string compactifications. Restricting ourselves to the closed string sector and assuming the absence of NSNS‐sources, we classify the minimal classical ingredients that evade the simplest no‐go theorems against dS vacua and inflation. Spaces with negative integrated curvature together with certain combinations of low‐dimensional orientifold planes and low‐rank RR‐fluxes emerge as the most promising setups of this analysis. We focus on two well‐controlled classes that lead to an effective 4D, 𝒩 = 1 supergravity description: Type IIA theory on group or coset manifolds with SU(3)‐structure and O6‐planes, as well as type IIB compactifications on SU(2)‐structure manifolds with O5‐ and O7‐planes. While fully stabilized AdS vacua are generically possible, a number of problems encountered in the search for dS vacua are discussed.

📜 SIMILAR VOLUMES

Consistent de Sitter string vacua from K
Consistent de Sitter string vacua from Kähler stabilization and D-term uplifting
✍ S.L. Parameswaran; A. Westphal 📂 Article 📅 2007 🏛 John Wiley and Sons 🌐 English ⚖ 172 KB

## Abstract In this note, we review our construction of de Sitter vacua in type IIB flux compactifications, in which moduli stabilization and D‐term uplifting can be combined consistently with the supergravity constraints. Here, the closed string fluxes fix the dilaton and the complex structure mod

De Sitter vacua in simple extended super
De Sitter vacua in simple extended supergravity
✍ A. Kehagias 📂 Article 📅 2009 🏛 John Wiley and Sons 🌐 English ⚖ 141 KB

## Abstract We show that de Sitter vacua exist in simple extended supergravity theories. In the particular 𝒩 = 2 case we are considering here, we find a de Sitter solution of the supergravity theory with gravity and gravitini turned on by taking into account ψ^4^ torsion terms.