Heavy quark potential and jet quenching parameter in a D-instanton   background
  Using the AdS/CFT correspondence, we study the heavy quark potential and the jet quenching parameter in the near horizon limit of D3-D(-1) background. The results are compared with those of conformal cases. It is shown that the presence of instantons tends to suppress the heavy quark potential and enhance the jet quenching parameter. 
Zi-qiang Zhang, De-fu Hou and Gang Chen
hep-ph