39 research outputs found
Monopole density around static color sources
We analyze the vacuum structure with respect to magnetic monopoles of
quenched QCD in the presence of static color sources. Distributions of the
monopole density around static quarks and mesons are computed in both phases of
QCD. We observe a suppression of the monopole density in the vicinity of
external sources. In the confinement phase the density of color magnetic
monopoles is reduced along the flux tube between a static quark-antiquark pair.Comment: 3 pages, uuencoded postscriptfile (690kB), Contribution to the XII
INTERNATIONAL SYMPOSIUM ON LATTICE FIELD THEORY, Bielefeld, Germany, 199
Properties of the Abelian Projection Fields in Lattice Gluodynamics
't~Hooft's abelian projection of gauge theory yields mutually
constrained, compact abelian fields which are permutationally equivalent. We
formulate the notion of ``species permutation'' symmetry of the abelian
projection fields and discuss its consequences for cross-species correlators.
We show that at large cross-species interactions are
suppressed relative to same-species interactions. Numerical simulations at
support our symmetry arguments and reveal the existence of inter-species
interactions of size {\cal O\/}\bigl({1\over N-1}\bigr) as analytically
predicted.Comment: 13 pages, 1 postscript figure include
The scalar and tensor glueballs in the valence approximation
We evaluate the infinite volume, continuum limit of and
glueball masses in the valence approximation. We find ~MeV and ~MeV, consistent with the interpretation
of as the lightest scalar glueball.Comment: (talk presented by A. Vaccarino at Lattice 93) 3 pages of PostScript
in uufiles compressed form. IBM-HET-94-
Structure of Abrikosov Vortices in SU(2) Lattice Gauge Theory
We calculate the electric flux and magnetic monopole current distribution in
the presence of a static quark-antiquark pair for SU(2) lattice gauge theory in
the maximal Abelian gauge. The current distribution confines the flux in a dual
Abrikosov vortex whose core size is comparable to the flux penetration depth.
The observed structure is described by a dual Ginzburg-Landau model.Comment: 15 pages, latex file, three figure postscript files appended, Report
No. LSUHEP No. 138-199
Abelian Links, Monopoles and Glueballs in SU(2) Lattice Gauge Theory
We investigate the masses of 0+ and 2+ glueballs in SU(2) lattice gauge
theory using abelian projection to the maximum abelian gauge. We calculate
glueball masses using both abelian links and monopole operators. Both methods
reproduce the known full SU(2) results quantitatively. Positivity problems
present in the abelian projection are discussed. We study the dependence of the
glueball masses on magnetic current loop size, and find that the 0+ state
requires a much greater range of sizes than does the 2+ state.Comment: 18 pages, latex, 4 postscript figure
Abelian Dominance in Chiral Symmetry Breaking
Calculations of the chiral condensate on
the lattice using staggered fermions and the Lanczos algorithm are presented.
Three gauge fields are considered: the quenched non-Abelian field, the Abelian
field projected in the maximal Abelian gauge, and the monopole field further
decomposed from the Abelian field. The results show that the Abelian monopoles
largely reproduce the chiral condensate values of the full non-Abelian theory,
both in SU(2) and in SU(3).Comment: 4 pages in Latex with 4 embedded Postscript figures, uses
espcrc2.sty, psfig.sty. All are uuencoded, gzipped in a self-extracting file.
Contribution to Lattice'95, Melbourne, Australi
Finite temperature phase transition in full QCD with flavors of clover fermions at and 10
We present results for QCD with flavors of dynamical quarks using
nonperturbatively improved Wilson fermions at finite temperature on and lattices. We determine the transition
temperature in the range of quark masses .
After fixing the Maximal Abelian gauge we investigate the contribution of
Abelian monopoles to the Polyakov loop, Polyakov loop susceptibility and
confirm Abelian and monopole dominance in full QCD.Comment: Lattice2003(topology), 3 pages, 6 figure
"Confinement Mechanism in Various Abelian Projections of Lattice Gluodynamics"
We show that the monopole confinement mechanism in lattice gluodynamics is a
particular feature of the maximal abelian projection. We give an explicit
example of the projection (the minimal abelian
projection), in which the confinement is due to topological objects other than
monopoles. We perform analytical and numerical study of the loop expansion of
the Faddeev--Popov determinant for the maximal and the minimal abelian
projections, and discuss the fundamental modular region for these projections.Comment: 16 pages (LaTeX) and 3 figures, report ITEP-94-6
Temperature Dependence of Extended and Fractional SU(3) Monopole Currents
We examine in pure SU(3) the dependence of extended monopole current k and
cross-species extended monopole current k^{cross} on temperature t, monopole
size L, and fractional monopole charge 1/q. We find that features of both k and
k^{cross} are sensitive to t for a range of L and q. In particular, the
spatial-temporal asymmetry ratios of both k and k^{cross} are sensitive over a
range of L and q to the SU(3) deconfinement transition. The motivation for
studying cross, extended, and fractional monopoles in SU(3) is given.Comment: 15 pages (archiving final publication version; very minor revisions
Monopole action and monopole condensation in SU(3) lattice QCD
Effective monopole actions for various extended monopoles are derived from
vacuum configurations after abelian projection in the maximally abelian gauge
in and lattice QCD. The actions obtained appear to be
independent of the lattice volume adopted. At zero temperature, monopole
condensation is seen to occur from energy-entropy balance in the strong
coupling region.
Larger is included in the monopole condensed phase as more extended
monopoles are considered. The scaling seen in the case is not yet
observed. The renormalization flow diagram suggests the existence of an
infrared fixed point. A hysteresis behavior is seen around the critical
temperature in the case of the action.Comment: 22 pages, latex, 10 figure