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Type: Journal article
Title: Vacuum structure revealed by over-improved stout-link smearing compared with the overlap analysis for quenched QCD
Author: Ilgenfritz, E.
Leinweber, D.
Moran, P.
Koller, K.
Schierholz, G.
Weinberg, V.
Citation: Physical Review. D. Particles, Fields, Gravitation and Cosmology, 2008; 77(7):0704502-01-0704502-12
Publisher: American Physical Soc
Issue Date: 2008
ISSN: 1550-7998
Statement of
E.-M. Ilgenfritz, D. Leinweber, P. Moran, K. Koller, G. Schierholz and V. Weinberg
Abstract: 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 $\lambda_{cut}$. 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 $200 \mathrm{MeV} < \lambda_{cut} < 600 \mathrm{MeV}$, 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.
Description: A publisher's note exists for this article. Please see the DOI link below for details.
Rights: ©2008 American Physical Society
RMID: 0020080724
DOI: 10.1103/PhysRevD.77.074502
Appears in Collections:Chemistry and Physics publications

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