New enhancements to Feynmans Path Integral for fermions
  We show that the computational effort for the numerical solution of fermionic quantum systems, occurring e.g., in quantum chemistry, solid state physics, field theory in principle grows with less than the square of the particle number for problems stated in one space dimension and with less than the cube of the particle number for problems stated in three space dimensions. This is proven by representation of effective algorithms for fermion systems in the framework of the Feynman Path Integral. 
Peter Borrmann and Eberhard R. Hilf (Physics Dept, Univ of Oldenburg)