Alessandro Valentino (Edinburgh):
Differential Cohomology and Quantum Gauge Fields
The aim of this seminar is to illustrate the role played recently by
(generalized) differential cohomology theories in abelian gauge field
theories, which include the theory of B-field and Ramond-Ramond fields
in string theory. In particular, we will discuss a recent construction
of the Hilbert space of such fields, as proposed by Freed, Moore, and
Segal, and, time permitting, propose a generalization of these arguments
to the specific case of Ramond-Ramond fields on orbifolds.