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Chiral symmetry restoration in the three-dimensional four-fermion model at non-zero temperature and density

J. B. Kogut·C. G. Strouthos
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Abstract

The three-dimensional four-fermion model with a Z_2 chiral symmetry and N=4 fermion species in the system is investigated numerically at non-zero temparature and chemical potential. The phase diagram in the (chemical potential, temperature) plane is mapped out quantitatively. A detailed finite size scaling analysis shows that the zero temperature and non-zero chemical potential chiral phase transition is first order, whereas the non-zero temperature and non-zero chemical potential transition remains second order down to very low temperatures. Quantitative results for the location of the end of the first order line are given. The simulations at T=0 provided no evidence for a nuclear liquid-gas transition.

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J. B. Kogut, C. G. Strouthos. 2000-10-17. Chiral symmetry restoration in the three-dimensional four-fermion model at non-zero temperature and density. https://doi.org/10.1103/physrevd.63.054502

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