Pion condensation in the Gross-Neveu model with nonzero baryon and isospin chemical potentials release_y7n34yx6anaa3cxqfxe3yaqmuu

by D. Ebert, K. G. Klimenko

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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→∞, 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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Type  report
Stage   submitted
Date   2009-02-11
Version   v1
Language   en ?
Number  HU-EP-09/03
arXiv  0902.1861v1
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