2,631 research outputs found
Various representations of infrared effective lattice QCD
We study various representations of the infrared effective theory of SU(2)
gluodynamics starting from the monopole action derived recently.
We determine the coupling constants in the abelian-Higgs model directly from
lattice QCD and evaluate the type of the QCD vacuum. The string action is
derived using the BKT transformation on the lattice. At the classical level
this action reproduces the physical string tension with a good accuracy.Comment: 3 pages, LaTeX, 2 figures; talk presented at LATTICE9
Existence of Chiral-Asymmetric Zero Modes in the Background of QCD-Monopoles
We study topological aspects of the QCD vacuum structure in SU(2) lattice
gauge theory with the abelian gauge fixing. The index of the Dirac operator is
measured by using the Wilson fermion in the quenched approximation. We find
chiral-asymmetric zero modes in background fields dominated by QCD-monopoles
without any cooling.Comment: 3 pages, Latex, 4 figures. Talk presented by S. Sasaki at XV
International Symposium on 'Lattice Field Theory (LATTICE 97)', July 22 - 26,
1997, Edinburgh, U
Localized eigenmodes of the covariant lattice Laplacian
We study numerically the eigenmode spectrum of the covariant lattice
Laplacian, in the fundamental SU(2) color group representation. It is found
that eigenmodes at the lower and upper ends of the spectrum are localized, and
that the localization volume scales. In contrast, the eigenmodes of the lattice
Faddeev-Popov operator are all extended rather than localized (as required for
confinement) despite the similarity of the kinetic and Faddeev-Popov operators.Comment: Talk presented by J. Greensite at Lattice2005 (Topology and
Confinement), Dublin, July 25-30, 2005; 6 pages, 4 figures, uses PoS.cls; to
appear in Proceedings of Scienc
A Conclusive Test of Abelian Dominance Hypothesis for Topological Charge in the QCD Vacuum
We study the topological feature in the QCD vacuum based on the hypothesis of
abelian dominance. The topological charge can be explicitly
represented in terms of the monopole current in the abelian dominated system.
To appreciate its justification, we directly measure the corresponding
topological charge , which is reconstructed only from the
monopole current and the abelian component of gauge fields, by using the Monte
Carlo simulation on SU(2) lattice. We find that there exists a one-to-one
correspondence between and in the maximally
abelian gauge. Furthermore, is classified by approximately
discrete values.Comment: LATTICE98(confine), 3 pages, Latex, 3 figures include
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