Rikard von Unge

Title: Superspace duality in two dimensions [pdf]
Abstract: A superspace duality relates two descriptions of the same physics using different sets of superfields. The most well known type of duality relies on the existence of a global symmetry and leads to T-duality of sigma models in two dimensions. There are however other types of dualities that do not require any special properties of the original theory and therefore are believed to always be possible to perform. We will show that surprisingly this is not the case and explain the physical mechanism behind this effect.