D-Branes on ALE Spaces and the ADE Classification of Conformal Field Theories
نویسنده
چکیده
The spectrum of D2-branes wrapped on an ALE space of general ADE type is determined, by representing them as boundary states of N = 2 superconformal minimal models. The stable quantum states have RR charges which precisely represent the gauge fields of the corresponding Lie algebra. This provides a simple and direct physical link between the ADE classification of N =2 superconformal field theories, and the corresponding root systems. An affine extension of this structure is also considered, whose boundary states represent the D2-branes plus additional D0-branes. CERN-TH/2000-178 June 2000 † On leave from Dept. of Physics, University of Oslo, N-0316 Oslo, Norway
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