Sigma models, generalized geometry and non-geometric flux backgrounds
| Quand ? |
Le 10/10/2019, de 16:00 à 17:00 |
|---|---|
| Où ? | iP2i - Salle du Conseil |
| Participants |
A. Chatzistavrakidis |
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Jeudi 10 octobre
Title: Sigma models, generalized geometry and non-geometric flux backgrounds
Athanasios Chatzistavrakidis (Division of Theoretical Physics, Rudjer Boskovic Institute, Zagreb, Croatia)
Abstract:
Motivated by string backgrounds with non-geometric fluxes and by the geometric underpinnings of string dualities, I will give an overview of recent developments from the viewpoint of sigma models. First, the appearance of the H-twisted standard Courant algebroid through the study of string propagation in singular spacetimes is briefly described. This leads us to consider membrane sigma models whose generalized Wess-Zumino terms are identified with all possible types of fluxes that can be turned on in the NSNS sector of a string compactification. It is shown that this interrelation holds for double field theory as well, albeit using a relaxed (almost) algebroid structure, thus providing a geometric explanation of its strong constraint. In the last part, we investigate these correspondences for SL(5) exceptional generalized geometry and discuss some open problems.