Eigenspectrum Noise Subtraction Methods in Lattice QCD

Details Eigenspectrum Noise Subtraction Methods in Lattice QCD Eigenspectrum Noise Subtraction Methods in Lattice QCD

2010-01-25

arxiv.org/abs/1001.4366v1

Pos (Lattice 2009) 041

Physics

High Energy Physics

High Energy Physics - Lattice

8 pages

Scientific paper

We propose a new noise subtraction method, which we call "eigenspectrum subtraction", which uses low eigenmode information to suppress statistical noise at low quark mass. This is useful for lattice calculations involving disconnected loops or all-to-all propagators. It has significant advantages over perturbative subtraction methods. We compare unsubtracted, eigenspectrum and perturbative error bar results for the scalar operator on a small Wilson QCD matrix.

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