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arxiv 2211.06902 v1 pith:VBVIM62W submitted 2022-11-13 hep-lat

Four-dimensional domain decomposition for the factorization of the fermion determinant

classification hep-lat
keywords determinantfermionfieldgaugedecompositiondependencedomainfactorization
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The non-local dependence of the fermion determinant on the gauge field limits our ability of simulating Quantum Chromodynamics on the lattice. Here we present a factorization of the gauge field dependence of the fermion determinant based on an overlapping four-dimensional domain decomposition of the lattice. The resulting action is block-local in the gauge and in the auxiliary bosonic fields. Possible applications are multi-level integration, master field simulations, and more efficient parallelizations of Monte Carlo algorithms and codes.

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