Orbifolds and Solitons
arXiv:hep-th/9512145 · doi:10.1016/0370-2693(96)00708-3
Abstract
We propose a conformal field theory description of a solitonic heterotic string in type $IIA$ superstring theory compactified on $K3$, generalizing previous work by J. Harvey, A. Strominger and A. Sen. In ten dimensions the construction gives a fivebrane which is related to the fundamental type $II$ string by electric -- magnetic duality, and to the Dirichlet fivebrane of type $IIB$ string theory by $SL(2, Z)$.
9 pages, harvmac; a few additional comments and references