468 research outputs found
Flux tubes and coherence length in the SU(3) vacuum
An estimate of the London penetration and coherence lengths in the vacuum of
the SU(3) pure gauge theory is given downstream an analysis of the transverse
profile of the chromoelectric flux tubes. Within ordinary superconductivity, a
simple variational model for the magnitude of the normalized order parameter of
an isolated vortex produces an analytic expression for magnetic field and
supercurrent density. In the picture of SU(3) vacuum as dual superconductor,
this expression provides us with the function that fits the chromoelectric
field data. The smearing procedure is used in order to reduce noise.Comment: 7 pages, 2 figures, presented at the 31st International Symposium on
Lattice Field Theory - LATTICE 2013 - July 29 - August 3, 2013 - Mainz,
German
Flux tubes at finite temperature
The chromoelectric field generated by a static quark-antiquark pair, with its
peculiar tube-like shape, can be nicely described, at zero temperature, within
the dual superconductor scenario for the QCD confining vacuum. In this work we
investigate, by lattice Monte Carlo simulations of the SU(3) pure gauge theory,
the fate of chromoelectric flux tubes across the deconfinement transition. We
find that, as the temperature is increased towards and above the deconfinement
temperature , the amplitude of the field inside the flux tube gets
smaller, while the shape of the flux tube does not vary appreciably across
deconfinement. This scenario with flux-tube "evaporation" above has no
correspondence in ordinary (type-II) superconductivity, where instead the
transition to the phase with normal conductivity is characterized by a
divergent fattening of flux tubes as the transition temperature is approached
from below. We present also some evidence about the existence of flux-tube
structures in the magnetic sector of the theory in the deconfined phase.Comment: arXiv admin note: text overlap with arXiv:1404.117
QCD flux tubes across the deconfinement phase transition
We study the behavior across the deconfinement phase transition of the
chromoelectric flux tube generated by a static quark and a static antiquark for
several distances between them. We present preliminary results for distances up
to 1.33 fm and temperatures up to .Comment: 8 pages, 6 figures, talk presented at the 35th International
Symposium on Lattice Field Theory, 18-24 June 2017, Granada, Spai
Spatial structure of the color field in the SU(3) flux tube
We report on the chromoelectric and chromomagnetic fields generated by a
static quark-antiquark pair at zero temperature in pure gauge SU(3). From the
spatial structure of chromoelectric field we extract its nonperturbative part
and discuss its properties.Comment: 7 pages, 3 figures, 2 tables, originally presented at the 36th Annual
International Symposium on Lattice Field Theory, 22-28 July, 2018, Michigan
State University, East Lansing, Michigan, US
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