Polyakov loop model with exact static quark determinant in the 't Hooft-Veneziano limit: U(N) case

Abstract

I investigate a d-dimensional U(N) Polyakov loop model that includes the exact static determinant with N_f degenerate quark flavor and depends explicitly on the quark mass and chemical potential. In the large N, N_f limit mean field gives the exact solution, and the core of the Polyakov loop model is reduced to a deformed unitary matrix model, which I solve exactly. I compute the free energy, the expectation value of the Polyakov loop, and the quark condensate. The phase diagram of the model and the type of phase transition is investigated and shows it depends on the ratio κ = N_f/N.