Role of mesonic fluctuations in the Polyakov loop extended quark-meson model at imaginary chemical potential

Details Role of mesonic fluctuations in the Polyakov loop extended quark-meson model at imaginary chemical potential Role of mesonic fluctuations in the Polyakov loop extended quark-meson model at imaginary chemical potential

2011-08-03

arxiv.org/abs/1108.0735v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, 7 figures, to appear in Phys.Rev.D

Scientific paper

We explore the thermodynamics and phase structure of the Polyakov loop-extended two flavor chiral quark--meson (PQM) model beyond the mean-field approximation at imaginary chemical potential. Our approach is based on the functional renormalization group (FRG) method. At finite temperature and imaginary chemical potential, we solve the renormalization group flow equation for a scale-dependent thermodynamic potential in the presence of the gluonic background field. We determine behavior of order parameters of the PQM model in the FRG approach and compute the phase diagram. We compare our FRG results with that obtained in the mean-field approximation at imaginary chemical potential.

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