Hagen Triendl

Spontaneous \mathcal{N} = 2 → \mathcal{N} = 1 supersymmetry breaking in supergravity and type II string theory

Using the embedding tensor formalism we give the general conditions for the existence of

The \mathcal{N} = 1 low-energy effective action of spontaneously broken \mathcal{N} = 2 supergravities

\mathcal{N}

The N=4 effective action of type IIA supergravity compactified on SU(2)-structure manifolds

= 1 vacua in spontaneously broken

Generalized N = 1 and N = 2 structures in M-theory and type II orientifolds

\mathcal{N}

The quantization problem in Scherk-Schwarz compactifications

= 2 supergravities. Our results confirm the necessity of having both electrically and magnetically charged multiplets in the spectrum, but also show that no further constraints on the special Kähler geometry of the vector multiplets arise. The quaternionic field space of the hypermultiplets must have two commuting isometries, and as an example we discuss the special quaternionic-Kähler geometries which appear in the low-energy limit of type II string theories. For these cases we find the general solution for stable Minkowski and AdS