Burch, Tommy and Hagen, Christian (2007) Domain decomposition improvement of quark propagator estimation. COMPUTER PHYSICS COMMUNICATIONS, 176 (2). pp. 137-145. ISSN 0010-4655,
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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 presented 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. The improvement of closed propagators is modest: on some configurations there are signs of significant noise reduction of disconnected correlators on others, the improvement amounts to a smoothening of the same correlators. (C) 2006 Published by Elsevier B.V.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | LATTICE QCD; lattice gauge theory; hadron spectroscopy |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 23 Dec 2020 07:47 |
| Last Modified: | 23 Dec 2020 07:47 |
| URI: | https://pred.uni-regensburg.de/id/eprint/33294 |
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