Improved Langevin Methods for Spin Systems

  title={Improved Langevin Methods for Spin Systems},
  author={Ian T. Drummond and Ron R. Horgan},
We investigate methods for variance reduction and the elimination of systematic error in a Fourier accelerated Langevin scheme for general spin models. We present results for the SU (3) × SU (3)/SU (3) model in two-dimensions that are consistent with those from multi-grid methods. We argue that the timing for the Langevin method makes it comparable to multi-grid for a given level of error.