Quiver Topology and RG Dynamics
  Renormalization group flows of quiver gauge theories play a central role in determining the low-energy properties of string vacua. We demonstrate that useful predictions about the RG dynamics of a quiver gauge theory may be extracted from the global structure of its quiver diagram. For quiver theories of a certain type, we develop an efficient and practical method for determining which superpotential deformations generate a flow to an interacting conformal fixed point. 
Vijay Balasubramanian, Bartlomiej Czech, Alfred D. Shapere, Brian   Wecht