### Noncommutative gauge theories on D-branes in non-geometric backgrounds

I will describe some new perspectives on non-geometric backgrounds of string theory from the open string perspective, by a detailed analysis of the low-energy effective gauge theory on D-branes in these backgrounds. This theory is a noncommutative Yang-Mills theory wherein the T-duality monodromies of the non-geometric background become Morita duality monodromies of the noncommutative gauge theory. We elaborate on this perspective in detail for T-folds arising via T-duality from twisted tori, and extend the considerations to backgrounds with R-flux where the noncommutative Yang-Mills theories have a dependence on the dual coordinates, and so have no formulation in a conventional spacetime.

**Tuesday, 9th of April 2019, 14:30, sala Wataghin**