Uplifting Maximal Supergravities

WALTER H. BARON

Saclay

Seminario; Seminario Regular del Instituto; 2014

Institut de Physique Theorique, CEA-Saclay

Supergravity theories are generally believed to describe some low-energy approximation of string theory models. There is, however, a huge landscape of 4-dimensional supergravity models whose higher-dimensional origin is not clear yet. This is already true for the most constrained scenario of maximal supergravities. After 35 years of progress in this direction we have found supporting evidence in favour of the idea that every electric maximal supergravity in 4 dimensions can be uplifted to M-theory. In this talk we will review the current understanding of this problem with special emphasis in the uplifting of non compact supergravites and their relation with Exceptional Generalised Geometry.