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Chiral Lagrangians at finite temperature and the Polyakov Loop
Heat kernel expansions at finite temperature of massless QCD and chiral quark
models generate effective actions relevant for both low and high temperature
QCD. The key relevance of the Polyakov Loop to maintain the large and
non-perturbative gauge invariance at finite temperature is stressed.Comment: Talk given at 6th Conference on Quark Confinement and the Hadron
Spectrum, Villasimius, Sardinia, Italy, 21-25 Sep 200
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