Dbranes, Quivers, and ALE Instantons
Abstract
Effective field theories in type I and II superstring theories for Dbranes located at points in the orbifold C^2/Z_n are supersymmetric gauge theories whose field content is conveniently summarized by a `quiver diagram,' and whose Lagrangian includes nonmetric couplings to the orbifold moduli: in particular, twisted sector moduli couple as FayetIliopoulos terms in the gauge theory. These theories describe Dbranes on resolved ALE spaces. Their spaces of vacua are moduli spaces of smooth ALE metrics and YangMills instantons, whose metrics are explicitly computable. For U(N) instantons, the construction exactly reproduces results of Kronheimer and Nakajima.
 Publication:

arXiv eprints
 Pub Date:
 March 1996
 arXiv:
 arXiv:hepth/9603167
 Bibcode:
 1996hep.th....3167D
 Keywords:

 High Energy Physics  Theory;
 Mathematics  Algebraic Geometry
 EPrint:
 50 pages, 11 figures, harvmac/epsf