A study of meson condensation and of the QCD critical line
Abstract
In this thesis work we have employed two microscopic models (ladder-QCD and Nambu-Jona-Lasinio) for describing the properties of the QCD phase diagram at finite temperature and quark densities. In particular, we have studied the mechanism of meson condensation at finite isospin and strangeness chemical potentials, and its competition with ``standard'' scalar fermionic condensates. In the last chapter, a detailed study of the chiral critical line at finite chemical potentials has been performed, achieving a remarkable agreement with recent lattice data.
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