Abstract
We extend the Polyakov‐loop extended Nambu–Jona‐Lasinio (PNJL) model by introducing an effective four‐quark vertex depending on the Polyakov loop. The effective vertex generates entanglement interactions between the Polyakov loop and the chiral condensate. The new model is consistent with lattice QCD data at imaginary quark‐number chemical potential and real and imaginary isospin chemical potentials. We investigate the influence of the entanglement interactions on the location of the critical endpoint at real quark‐number chemical potential.
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