Towards Supergravity Duals of Chiral Symmetry Breaking in   Sasaki-Einstein Cascading Quiver Theories
  We construct a first order deformation of the complex structure of the cone over Sasaki-Einstein spaces Y^{p,q} and check supersymmetry explicitly. This space is a central element in the holographic dual of chiral symmetry breaking for a large class of cascading quiver theories. We discuss a solution describing a stack of N D3 branes and M fractional D3 branes at the tip of the deformed spaces. 
Benjamin A. Burrington, James T. Liu, Manavendra Mahato and Leopoldo   A. Pando Zayas