QCD vacuum structure

Pérez, Margarita Garcı́a

doi:10.1016/s0920-5632(01)00924-0

Cited by 11 publications

(1 citation statement)

References 65 publications

(75 reference statements)

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“…Coalescence happens finally below q cut /q max = 0.1. We see that the UV smoothed density exhibits cluster properties similar to the instanton model [19] or what cooling studies on the lattice have shown earlier [20,21].…”

Section: Cluster Analysissupporting

confidence: 72%

Topological Structure of the QCD Vacuum Revealed by Overlap Fermions

Ilgenfritz

Koller

Koma

et al. 2010

High Performance Computing in Science and Engineering, Garching/Munich 2009

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Overlap fermions preserve a remnant of chiral symmetry on the lattice. They are a powerful tool to investigate the topological structure of the vacuum of Yang-Mills theory and full QCD. Recent results concerning the localization of topological charge and the localization and local chirality of the overlap eigenmodes are reported. The charge distribution is radically different, if a spectral cut-off for the Dirac eigenmodes is applied. The density q(x) is changing from the scale-a charge density (with full lattice resolution) to the ultraviolet filtered charge density. The scale-a density, computed on the Linux cluster of LRZ, has a singular, sign-coherent global structure of co-dimension 1 first described by the Kentucky group. We stress, however, the cluster properties of the UV filtered topological density resembling the instanton picture. The spectral cut-off can be mapped to a bosonic smearing procedure. The UV filtered field strength reveals a high degree of (anti)selfduality at "hot spots" of the action. The fermionic eigenmodes show a high degree of local chirality. The lowest modes are seen to be localized in low-dimensional space-time regions.Comment: 13 pages, 11 figures, accepted to appear in the Proceedings of "HLRB, KONWIHR and Linux-Cluster: Review, Results and Future Projects Workshop", Leibniz Rechenzentrum Munich, December 200

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Section: Cluster Analysissupporting

confidence: 72%

Topological Structure of the QCD Vacuum Revealed by Overlap Fermions

Ilgenfritz

Koller

Koma

et al. 2010

High Performance Computing in Science and Engineering, Garching/Munich 2009

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Chiral symmetry on the lattice

Gattringer

Lang

2009

Quantum Chromodynamics on the Lattice

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Topological susceptibility in full QCD: lattice results versus the prediction from the QCD partition function with granularity

Dürr

2001

Nuclear Physics B

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Recent lattice data from CP-PACS, UKQCD, SESAM/TXL and the Pisa group regarding the quark mass dependence of the topological susceptibility in 2-flavour QCD are compared to each other and to theoretical expectations. The latter get specified by referring to the QCD finite-volume partition function with "granularity" which accounts for the entropy brought by instantons and anti-instantons. The chiral condensate in N f = 2 QCD, if determined by this method, turns out surprisingly large.

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QCD vacuum structure

Abstract: Several issues related to the structure of the QCD vacuum are reviewed. We concentrate mostly on results concerning instantons and center vortices.Comment: Lattice 2000 (Plenary), 8 pages, 2 figures; typos corrected, hep-numbers of references updated, one figure replaced by black and whit

Cited by 11 publications

References 65 publications

Topological Structure of the QCD Vacuum Revealed by Overlap Fermions

Topological Structure of the QCD Vacuum Revealed by Overlap Fermions

Chiral symmetry on the lattice

Topological susceptibility in full QCD: lattice results versus the prediction from the QCD partition function with granularity

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