出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：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 congurations, 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.
