Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2005-12-19
Phys.Rev.D75:014502,2007
Physics
High Energy Physics
High Energy Physics - Lattice
18 pages, 10 figures
Scientific paper
10.1103/PhysRevD.75.014502
We study the phase diagram of quark matter at finite temperature (T) and finite chemical potential (mu) in the strong coupling limit of lattice QCD for color SU(3). We derive an analytical expression of the effective free energy as a function of T and mu, including baryon effects. The finite temperature effects are evaluated by integrating over the temporal link variable exactly in the Polyakov gauge with anti-periodic boundary condition for fermions. The obtained phase diagram shows the first order phase transition at low temperatures and the second order phase transition at high temperatures separated by the tri-critical point in the chiral limit. Baryon has effects to reduce the effective free energy and to extend the hadron phase to a larger mu direction at low temperatures.
Kawamoto Noboru
Miura Kohtaroh
Ohnishi Akira
Ohnuma Toshiharu
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