132 research outputs found
On the interrelation between monopoles, vortices, topological charge and chiral symmetry breaking: an analysis using overlap fermions for SU(2)
We study the properties of configurations from which P-vortices on one hand
or Abelian monopoles on the other hand have been removed. We find that the zero
modes and the band of non-zero modes close to zero disappear from the spectrum
of the overlap Dirac operator, confirming the absence of topological charge and
quark condensate. The different behavior of the modified ensembles under
smearing compared to the unmodified Monte Carlo ensemble corroborates these
findings. The gluonic topological susceptibility rapidly approaches zero in
accordance with Q_{index}=0. The remaining (ultraviolet) monopoles without
vortices and -- to a less extent -- the remaining vortices without monopoles
are unstable under smearing whereas smearing of the unmodified Monte Carlo
ensemble effects the monopoles and vortices only by smoothing, reducing the
density only slightly.Comment: 13 pages, 5 figures, strongly revised, results added, one figure
added, accepted for publication, title changed
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
Blocking from continuum and monopoles in gluodynamics
We review the method of blocking of topological defects from continuum used
as a non--perturbative tool to construct effective actions for these defects.
The actions are formulated in the continuum limit while the couplings of these
actions can be derived from simple observables calculated numerically on
lattices with a finite lattice spacing. We demonstrate the success of the
method in deriving the effective actions for Abelian monopoles in the pure
SU(2) gauge models in an Abelian gauge. In particular, we discuss the
gluodynamics in three and four space--time dimensions at zero and non--zero
temperatures. Besides the action the quantities of our interest are the
monopole density, the magnetic Debye mass and the monopole condensate.Comment: 24 pages, 16 figures, RevTeX 4; To be published in Phys. Atom. Nucl.
dedicated to the 70th Birthday of Professor Yu. A. Simono
First experience of seismodeformation monitoring of Baikal rift zone (by the example of South-Baikal earthquake of 27 August 2008)
A novel method of data processing – a structural functions curvature analysis method – was applied to the time series of seismodeformation monitoring of Baikal rift zone from April to November 2008, revealing the unique features of monitoring variable behaviour that can be considered as a revelation of precursors to the intensive South-Biakal earthquake (<I>M</I>=6.3, at 09:31 on 27 August 2008). The idea of a new approach leans upon basic ideas of modern physics of self-organized criticality and open non-equilibrium systems in general
Dual Superconductor Scenario of Confinement: A Systematic Study of Gribov Copy Effects
We perform a study of the effects from maximal abelian gauge Gribov copies in
the context of the dual superconductor scenario of confinement, on the basis of
a novel approach for estimation of systematic uncertainties from incomplete
gauge fixing. We present numerical results, in SU(2) lattice gauge theory,
using the overrelaxed simulated annealing gauge fixing algorithm. We find
abelian and non-abelian string tensions to differ significantly, their ratio
being 0.92(4) at BETA = 2.5115. An approximate factorization of the abelian
potential into monopole and photon contributions has been confirmed, the former
giving rise to the abelian string tension.Comment: 35 pages uucompressed LaTeX with 10 encapsuled postscript figure
Abelian Dyons in the Maximal Abelian Projection of SU(2) Gluodynamics
Correlations of the topological charge Q, the electric current J^e and the
magnetic current J^m in SU(2) lattice gauge theory in the Maximal Abelian
projection are investigated. It occurs that the correlator > is
nonzero for a wide range of values of the bare charge. It is shown that: (i)
the abelian monopoles in the Maximal Abelian projection are dyons which carry
fluctuating electric charge; (ii) the sign of the electric charge e(x)
coincides with that of the product of the monopole charge m(x) and the
topological charge density Q(x).Comment: 6 pages, 2 EPS figures, LaTeX, uses epsf.sty; revision: minor
corrections, references adde
Dynamics of Monopoles and Flux Tubes in Two-Flavor Dynamical QCD
We investigate the confining properties of the QCD vacuum with
flavors of dynamical quarks, and compare the results with the properties of the
quenched theory. We use non-perturbatively improved Wilson
fermions to keep cut-off effects small. We focus on color magnetic monopoles.
Among the quantities we study are the monopole density and the monopole
screening length, the static potential and the profile of the color electric
flux tube. We furthermore derive the low-energy effective monopole action.
Marked differences between the quenched and dynamical vacuum are found.Comment: 34 pages, 28 figures, Late
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