Type I D-branes in an H-flux and twisted KO-theory
arXiv:hep-th/0310164 · doi:10.1088/1126-6708/2003/11/053
Abstract
Witten has argued that charges of Type I D-branes in the presence of an H-flux, take values in twisted KO-theory. We begin with the study of real bundle gerbes and their holonomy. We then introduce the notion of real bundle gerbe KO-theory which we establish is a geometric realization of twisted KO-theory. We examine the relation with twisted K-theory, the Chern character and provide some examples. We conclude with some open problems.
23 pages, Latex2e, 2 new references added