出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We present a canonical approach to study properties of QCD at finite baryon density r, and apply
it to the determination of the phase diagram of four-flavour QCD. For a pion mass mp ∼ 350
MeV, the first-order transition between the hadronic and the plasma phase gives rise to a coexistence
region in the T-r plane, which we study in detail. We obtain accurate results for systems
containing up to 30 baryons and quark chemical potentials m up to 2T. Our T-m phase diagram
agrees with the literature when m
T .1. At larger chemical potential, we observe a “bending down”
of the phase boundary. We characterise the two phases with simple models: the hadron resonance
gas in the hadronic phase, the free massless quark gas in the plasma phase.
