56 citations · 124 across the 4 of their papers we have counts for
4 papers
Gerbes and Lie Groups
Christoph Schweigert, Konrad Waldorf
We present a review of bundle gerbes, emphasizing their relations to Lie groups. Indeed, compact Lie groups do not only carry the structure of a Riemannian manifold, but also canon…
Bi-branes: Target Space Geometry for World Sheet topological Defects
Jürgen Fuchs, Christoph Schweigert, Konrad Waldorf
We establish that the relevant geometric data for the target space description of world sheet topological defects are submanifolds - which we call bi-branes - in the product M1 x M…
More Morphisms between Bundle Gerbes
Konrad Waldorf
Usually bundle gerbes are considered as objects of a 2-groupoid, whose 1-morphisms, called stable isomorphisms, are all invertible. I introduce new 1-morphisms which include stable…
WZW orientifolds and finite group cohomology
Krzysztof Gawedzki, Rafal R. Suszek, Konrad Waldorf
The simplest orientifolds of the WZW models are obtained by gauging a Z_2 symmetry group generated by a combined involution of the target Lie group G and of the worldsheet. The act…