Improvement of quark propagator estimation through domain decomposition

Details Improvement of quark propagator estimation through domain decomposition Improvement of quark propagator estimation through domain decomposition

2006-09-07

arxiv.org/abs/hep-lat/0609011v1

PoSLAT2006:169,2006

Physics

High Energy Physics

High Energy Physics - Lattice

7 pages, 3 figures, parallel session talk at Lattice 2006

Scientific paper

Applying domain decomposition to the lattice Dirac operator and the associated quark propagator, we arrive at expressions which, with the proper insertion of random sources therein, can provide improvement to the estimation of the propagator. Schemes are considered for both open and closed (or loop) propagators. In the end, our technique for improving open contributions is similar to the ``maximal variance reduction'' approach of Michael and Peisa, but contains the advantage, especially for improved actions, of dealing directly with the Dirac operator. Using these improved open propagators for the Chirally Improved operator, we present preliminary results for the static-light meson spectrum.

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