From Chiral quark dynamics with Polyakov loop to the hadron resonance   gas model
  Chiral quark models with Polyakov loop at finite temperature have been often used to describe the phase transition. We show how the transition to a hadron resonance gas is realized based on the quantum and local nature of the Polyakov loop. 
E. Ruiz Arriola, E. Megias, L. L. Salcedo
hep-ph nucl-th