Abstract
We discuss the isentropic trajectories on the QCD phase diagram in the temperature and the quark chemical potential plane using the Nambu–Jona–Lasinio model with the Polyakov loop coupling (PNJL model). We impose a constraint on the strange quark chemical potential so that the strange quark density is kept to zero to mimic a situation in the ultra relativistic heavy-ion collisions. We then find an interesting relation between the induced strange quark chemical potential and the ratio of the Polyakov loop and the anti-Polyakov loop.
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