Speaker
Ivano Basile
Description
Examining spacetime topology change in quantum gravity leads to the triviality of cobordism classes: all transitions are allowed. This strong requirement entails the existence of extended objects, bundles of geometry carrying topological currents on their worldvolumes. Generally, the precise form of such currents is not very constrained. I will present a novel idea on how to fix their precise form when topological charges are encoded in more refined (co)homology theories. In the case of K-theory, topological currents characteristic of D-branes and O-planes arise from this bottom-up approach.
