Marco Baumgartl (Hamburg U.)
An exact description of D-brane moduli spaces from the worldsheet perspective is often only possible in the vicinity of certain points. In order to explore larger parts of it we study classes of BPS-branes on Calabi-Yau manifolds in the topological B-model which have unobstructed open string moduli. A close investigation of their spectra reveals the non-trivial global structure of their moduli spaces. Our approach allows us to use worldsheet methods in order to obtain potentials for supersymmetry breaking, and we confirm known geometric results.
Arnold Sommerfeld Center