Multigrid for propagators of staggered fermions in four-dimensional SU(2) gauge fields
Abstract
Multigrid (MG) methods for the computation of propagators of staggered fermions in non-Abelian gauge fields are discussed. MG could work in principle in arbitrarily disordered systems. The practical variational MG methods tested so far with a ``Laplacian choice'' for the restriction operator are not competitive with the conjugate gradient algorithm on lattices up to 184. Numerical results are presented for propagators in SU(2) gauge fields.
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