Kenji Fukushima, Kouji Kashiwa
We investigate quark deconfinement by calculating the effective potential of the Polyakov loop using the non-perturbative propagators in the Landau gauge measured in the finite-temperature lattice simulation. We find that the Polyakov loop shows a first-order and second-order phase transitions for the pure SU(2) and SU(3) Yang-Mills theories, respectively. We also estimate the thermodynamic quantities to confirm quantitative agreement with the lattice data near the critical temperature. We then introduce the effect of dynamical quarks to discuss simultaneous crossovers of deconfinement and chiral restoration. We emphasize that, because the physical contents in the Polyakov-loop effective potential are clear, this method is far advantageous than conventional parametrization to include in-medium screening through the polarization which is missing in most of the QCD phase-diagram research.
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http://arxiv.org/abs/1206.0685
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