THERMODYNAMICS OF 4-FERMION MODELS IN THE DELTA-EXPANSION

被引：9

作者：

GANDHI, SK ^{[1
]}

PINTO, MB ^{[1
]}

机构：

[1] UNIV FED SANTA CATARINA,DEPT FIS,BR-88040900 FLORIANOPOLIS,BRAZIL

来源：

PHYSICAL REVIEW D | 1994年 / 49卷 / 08期

关键词：

D O I：

10.1103/PhysRevD.49.4258

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Using the linear delta expansion we investigate the free energy of the 1 + 1 and 2 + 1 dimensional Gross-Neveu model. In both cases the large-N result is exactly reproduced at first order in delta. However, when higher-order corrections are included our results for the phase transition differ both quantitatively and qualitatively from the large-N predictions. In particular, our result for the critical temperature in 1 + 1 dimensions is in better agreement with a general theorem for phase transitions in one space dimension.

引用

页码：4258 / 4264

页数：7

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