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- W2784387002 abstract "Critical slowing down in Krylov methods for the Dirac operator presents a major obstacle to further advances in lattice field theory as it approaches the continuum solution. Here we formulate a multigrid algorithm for the Kogut-Susskind (or staggered) fermion discretization which has proven difficult relative to Wilson multigrid due to its first-order anti-Hermitian structure. The solution is to introduce a novel spectral transformation by the Kahler-Dirac spin structure prior to the Galerkin projection. We present numerical results for the two-dimensional, two-flavor Schwinger model; however, the general formalism is agnostic to dimension and is directly applicable to four-dimensional lattice QCD." @default.
- W2784387002 created "2018-02-02" @default.
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- W2784387002 date "2018-06-28" @default.
- W2784387002 modified "2023-10-16" @default.
- W2784387002 title "Multigrid algorithm for staggered lattice fermions" @default.
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- W2784387002 doi "https://doi.org/10.1103/physrevd.97.114513" @default.
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