Locality and scaling of quenched overlap fermions

Terrence Draper, Nilmani Mathur, Jianbo Zhang, Andrei Alexandru, Ying Chen, Shao Jing Dong, Ivan Horváth, Frank Lee, Sonali Tamhankar

Research output: Contribution to journalConference articlepeer-review


The overlap fermion offers the tremendous advantage of exact chiral symmetry on the lattice, but is numerically intensive. This can be made affordable while still providing large lattice volumes, by using coarse lattice spacing, given that good scaling and localization properties are established. Here, using overlap fermions on quenched Iwasaki gauge configurations, we demonstrate directly that the overlap Dirac operator's range is comfortably small in lattice units for each of the lattice spacings 0.20 fm, 0.17 fm, and 0.13 fm (and scales to zero in physical units in the continuum limit). In particular, our direct results contradict recent speculation that an inverse lattice spacing of 1GeV is too low to have satisfactory localization. Furthermore, hadronic masses (available on the two coarser lattices) scale very well.

Original languageEnglish
JournalProceedings of Science
StatePublished - 2005
Event23rd International Symposium on Lattice Field Theory, LAT 2005 - Dublin, Ireland
Duration: Jul 25 2005Jul 30 2005

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ASJC Scopus subject areas

  • General


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