Abstract
We study the phase diagram of quark matter at finite temperature () and chemical potential () 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 and , including baryon effects. The finite temperature effects are evaluated by integrating over the temporal link variable exactly in the Polyakov gauge with an antiperiodic boundary condition for fermions. The obtained phase diagram shows the first and the second order phase transition at low and high temperatures, respectively, and those are separated by the tricritical point in the chiral limit. Baryon has effects to reduce the effective free energy and to extend the hadron phase to a larger direction at low temperatures.
3 More- Received 3 February 2006
DOI:https://doi.org/10.1103/PhysRevD.75.014502
©2007 American Physical Society