Twisted D-branes of the image WZW model and level-rank duality Original Research Article

We analyze the level-rank duality of image-twisted D-branes of image (when N and image). When N or K is even, the duality map involves image-cominimal equivalence classes of twisted D-branes. We prove the duality of the spectrum of an open string stretched between image-twisted D-branes, and ascertain the relation between the charges of level-rank-dual image-twisted D-branes.