Dbrane boundstate wavefunctions
  A simple WKB approximation gives explicit information about D0brane boundstate wavefunctions, suggesting that at large $N$ each individual D0brane has a wavefunction $\exp(- c r^{9/2}N^{-1/2}).$ Thus the velocity dependent interaction energy $v^{4}r^{-7}$ leads to an effective confining potential that grows as $r^{7}.$ 
Vipul Periwal