Improving the locality of the overlap Dirac operator via approximate solutions of the GinspargWilson relation
Abstract
We determine a free field hypercubic lattice Dirac operator which is optimally close to satisfying the GinspargWilson relation. Inserting this operator into the overlap formula, we show that the analytic locality bound on the resulting overlap Dirac operator is substantially stronger than in the standard case. The improvement generally persists in gauge backgrounds when the plaquette variables are all close to unity.
 Publication:

Nuclear Physics B Proceedings Supplements
 Pub Date:
 March 2004
 DOI:
 10.1016/S09205632(03)026264
 arXiv:
 arXiv:heplat/0309148
 Bibcode:
 2004NuPhS.129..513A
 Keywords:

 High Energy Physics  Lattice
 EPrint:
 3 pages, contributed to Proceedings of Lattice2003(chiral)