D-Brane Instantons and K-Theory Charges
Abstract
We discuss some physical issues related to the K-theoretic classification of D-brane charges, putting an emphasis on the role of D-brane instantons. The relation to D-instantons provides a physical interpretation to the mathematical algorithm for computing K-theory known as the ``Atiyah-Hirzebruch spectral sequence''. Conjecturally, a formulation in terms of D-instantons leads to a computationally useful formulation of K-homology in general. As an application and illustration of this viewpoint we discuss some issues connected with D-brane charges associated with branes in WZW models. We discuss the case of SU(3) in detail, and comment on the general picture of branes in SU(N), based on a recent result of M. Hopkins.
- Publication:
-
Journal of High Energy Physics
- Pub Date:
- November 2001
- DOI:
- 10.1088/1126-6708/2001/11/062
- arXiv:
- arXiv:hep-th/0108100
- Bibcode:
- 2001JHEP...11..062M
- Keywords:
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- High Energy Physics - Theory
- E-Print:
- 44 pages, harvmac, b-mode