2024-03-28T16:43:16Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/188732022-11-17T02:08:08Zhdl_2115_20039hdl_2115_116Phase diagram at finite temperature and quark density in the strong coupling limit of lattice QCD for color SU(3)Kawamoto, N.Miura, K.Ohnishi, A.Ohnuma, T.429.6We study the phase diagram of quark matter at finite temperature (T) and chemical potential (µ) 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 µ, 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 µ direction at low temperatures.American Physical SocietyJournal Articleapplication/pdfhttp://hdl.handle.net/2115/18873https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/18873/1/PRD75-1.pdf0556-28211089-4918Physical Review D7510145022007-01enginfo:doi/10.1103/PhysRevD.75.014502Copyright © 2007 American Physical Societypublisher