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Positivity of center subsets for QCD

Bloch, Jacques ; Bruckmann, Falk


We further pursue an approach to the sign problem of quantum chromodynamics at nonzero chemical potential, in which configurations of the lattice path integral are gathered into subsets. In the subset construction we multiply each temporal link by center elements independently and in a first step neglect the gauge action. The positivity of the subset weights-shown for 0 + 1 dimensions in an ...


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