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arXiv · 0902.1861

Pion condensation in the Gross-Neveu model with nonzero baryon and isospin chemical potentials

D. Ebert·K. G. Klimenko
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Abstract

The properties of the two-flavored Gross-Neveu model in the (1+1)-dimensional spacetime are investigated in the presence of the isospin $μ_I$ as well as quark number $μ$ chemical potentials both at zero and nonzero temperatures. The consideration is performed in the limit $N_c\to\infty$, i.e. in the case with an infinite number of colored quarks. In the plane of parameters $μ_I,μ$ a rather rich phase structure is found, which contains phases with and without pion condensation. Moreover, we have found a great variety of one-quark excitations of these phases, including gapless and gapped quasiparticles.

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D. Ebert, K. G. Klimenko. 2009-02-11. Pion condensation in the Gross-Neveu model with nonzero baryon and isospin chemical potentials. https://doi.org/10.1103/physrevd.80.125013

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