D-Branes And K-Theory
Abstract
By exploiting recent arguments about stable nonsupersymmetric D-brane states, we argue that D-brane charge takes values in the K-theory of spacetime, as has been suspected before. In the process, we gain a new understanding of some novel objects proposed recently -- such as the Type I zerobrane -- and we describe some new objects -- such as a -1-brane in Type I superstring theory.Keywords
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