出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：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 staticlight
meson spectrum.
