Multigrid Monte Carlo Method for Lattice Field Theories

Abstract
We propose a stochastic generalization of the multigrid method, which reduces critical slowing down in Monte Carlo computations of lattice field theories. For free fields, critical slowing down is completely eliminated. For a φ4 model, numerical experiments show a factor of ≅ 10 reduction, over a standard heat-bath algorithm, in the work needed to get a given accuracy (error-bar size).

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