期刊
BRAZILIAN JOURNAL OF PHYSICS
卷 37, 期 1B, 页码 258-264出版社
SPRINGER
DOI: 10.1590/S0103-97332007000200016
关键词
non perturbative methods; Gross-Neveu model; finite temperature; finite density
We use the linear 5 expansion, or optimized perturbation theory, to evaluate the effective potential for the two dimensional Gross-Neveu model at finite temperature and density obtaining analytical equations for the critical temperature, chemical potential and fermionic mass which include finite N corrections. Our results seem to improve over the traditional large-N predictions.
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