A detailed comparison is made between the topological structure of quenched QCD as revealed by the recently proposed over-improved stout-link smearing in conjunction with an improved gluonic definition of the topological density on one hand and a similar analysis made possible by the overlap-fermionic topological charge density both with and without variable ultraviolet cutoff λcut. The matching is twofold, provided by fitting the density-density two-point functions on one hand and by a point-by-point fitting of the topological densities according to the two methods. We point out the similar cluster structure of the topological density for moderate smearing and 200MeV<λcut<600MeV, respectively. We demonstrate the relation of the gluonic topological density for extensive smearing to the location of the overlap zero modes and the lowest overlap non-zero mode as found for the unsmeared configurations.
@article{arxiv.0801.1725,
title = {Vacuum structure revealed by over-improved stout-link smearing compared with the overlap analysis for quenched QCD},
author = {E. -M. Ilgenfritz and D. Leinweber and P. Moran and K. Koller and G. Schierholz and V. Weinberg},
journal= {arXiv preprint arXiv:0801.1725},
year = {2014}
}