Improved Langevin Methods for Spin Systems
I T Drummond, R R Horgan
Abstract
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 wit h 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.
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