Many Body Diffusion and Interacting Electrons in a Harmonic Confinement
  We present numerically exact energy estimates for two-dimensional electrons in a parabolic confinement. By application of an extension of the recently introduced many-body diffusion algorithm, the ground-state energies are simulated very efficiently. The new algorithm relies on partial antisymmetrization under permutation of particle coordinates. A comparison is made with earlier theoretical results for that system. 
F. Luczak, F. Brosens, J. T. Devreese, L. F. Lemmens