A Langevin approach to fermion and quantum spin correlation functions
John R. Klauder · Journal of Physics A Mathematical and General · 1983
By using spin-coherent states, the author shows that correlation functions for fermions or quantum spins follow from solutions to Langevin equations associated with a functional integral representation of the partition function. His method is applicable to any number of dimensions, may also be combined with boson variables, and is suitable for computer simulations.