1998/10/31 by Edward Witten · 3 citations
Physics and Astronomy · #hep-th
paper · pdf · doi:10.1088/1126-6708/1998/12/019
published as JHEP 9812:019,1998 · additional references; 44 pp
arxiv created 1998/11/04 · arxiv updated 2010/04/07
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.