D-branes, B-fields and twisted K-theory

Abstract

In this note we propose that D-brane charges, in the presence of a topologically non-trivial B-field, are classified by the K-theory of an infinite dimensional C^*-algebra. In the case of B-fields whose curvature is pure torsion our description is shown to coincide with that of Witten.

LaTeX2e, 11 pages. Some typos corrected, minor additions including one reference

Cited by in corpus (87)

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