Properties of the massive Gross-Neveu model with nonzero baryon and isospin chemical potentials
Properties of the massive Gross-Neveu model with nonzero baryon and isospin chemical potentials
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DOI：
10.1103/physrevd.80.125013
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发表时间：
2009-02
影响因子：
5
通讯作者：
D. Ebert;K. Klimenko
中科院分区：
文献类型：
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作者：
D. Ebert;K. Klimenko
在有限同位旋 μ I 以及夸克数 μ 化学势和零温度下，研究了具有非零电流夸克质量的双味 Gross-Neveu 模型的性质。考虑是在极限 N c → ∞ 下进行的，即有无限个有色夸克的情况。在参数μ I 、μ 的平面中，发现了相当丰富的相结构，其中包含有和没有π介子凝聚的相。我们发现了这些相的多种单夸克激发，包括无带隙和带隙准粒子。此外，还研究了各相的介音质谱。
The properties of the two-flavored Gross-Neveu model with nonzero current quark mass are investigated in the (1 + 1)-dimensional space-time at finite isospin μ I as well as quark number μ chemical potentials and zero temperature. 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. We have found a great variety of one-quark excitations of these phases, including gapless and gapped quasiparticles. Moreover, the mesonic mass spectrum in each phase is also investigated.