Boundary Rings and N = 2 CosetModels
نویسندگان
چکیده
We investigate boundary states of N = 2 coset models based on Grassmannians Gr(n, n+k), and find that the underlying intersection geometry is given by the fusion ring of U (n). This is isomorphic to the quantum cohomology ring of Gr(n, n+k+1), which in turn can be encoded in a " boundary " superpotential whose critical points correspond to the boundary states. In this way the intersection properties can be represented in terms of a soliton graph that forms a generalized, Z Z n+k+1 symmetric McKay quiver. We investigate the spectrum of bound states and find that the rational boundary CFT produces only a small subset of the possible quiver representations.
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