Phase diagram at finite temperature and quark density in the strong coupling limit of lattice QCD for color SU(3)

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N. Kawamoto, K. Miura, A. Ohnishi, and T. Ohnuma
Division of Physics, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan

Received 3 February 2006; revised 16 September 2006; published 11 January 2007

Westudy the phase diagram of quark matter at finite temperature(T) and chemical potential (µ) in the strong coupling limitof lattice QCD for color SU(3). We derive an analyticalexpression of the effective free energy as a function ofT and µ, including baryon effects. The finite temperature effectsare evaluated by integrating over the temporal link variable exactlyin the Polyakov gauge with an antiperiodic boundary condition forfermions. The obtained phase diagram shows the first and thesecond order phase transition at low and high temperatures, respectively,and those are separated by the tricritical point in thechiral limit. Baryon has effects to reduce the effective freeenergy and to extend the hadron phase to a largerµ direction at low temperatures.

URL:	http://link.aps.org/doi/10.1103/PhysRevD.75.014502
DOI:	10.1103/PhysRevD.75.014502
PACS:	12.38.Gc; 25.75.Nq; 11.15.Me; 11.10.Wx 12.38.Gc Lattice QCD calculations 25.75.Nq Quark deconfinement, quark-gluon plasma production, and phase transitions in heavy-ion collisions 11.15.Me Strong-coupling expansions in gauge theories 11.10.Wx Finite-temperature field theory YEAR: 2007

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Phys. Rev. D 75, 014502 (2007) [18 pages]

Phase diagram at finite temperature and quark density in the strong coupling limit of lattice QCD for color SU(3)

REFERENCES (43)

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A new free weekly publication from APS