6D (1,1) gauged supergravities from orientifold compactifications

Abstract

Abstract We study dimensional reductions of M-theory/type II strings down to 6D in the presence of fluxes and spacetime filling branes and orientifold planes of different types. We classify all inequivalent orientifold projections giving rise to N $$ \mathcal{N} $$ = (1, 1) supergravities in 6D and work out the embedding tensor/fluxes dictionary for each of those. Finally we analyze the set of vacua for the different classes of reductions and find an abundance of “no-scale” type Minkowski vacua, as well as a few novel examples of (A)dS extrema.

Keywords

• Flux compactifications
• String theory and cosmic strings
• Superstring Vacua