Abstract
A brief introduction to the boundary state approach to Dirichlet branes is given. The example of the non-BPS D-string of Type IIA on K3 is analysed in some detail, and its dual heterotic state is identified.
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Submitted on 19 Aug 1999 (v1), last revised 25 Aug 1999 (this version, v2)
Updated
arXiv.org
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