摘要
利用相干态有效势方法,本文重新研究了Gross-Neveu(GN)模型,对于任意分量N的费米场得到了一个“非平凡”的“Autonomous”理论.当N→∞时,该理论与GN的结果等价.“Autonomous”理论的动力学破缺的对称性将在某个临界温度得到恢复,在破缺相元激发的质量仅仅与温度有关而与N无关.
By means of the coherent state effective potential method, we re-examine the Gross-Neveu (GN) model. A nontrivial autonomous theory is obtained for any N(N is the number of the fermion fields). When N→∞, the theory is equivalent to that obtained by GN. The dynamical symmetry of the autonomous phase will be restored at the critical temperature. The mass of the elementary excitation is N independent but temperature dependent.
出处
《高能物理与核物理》
CSCD
北大核心
1990年第3期228-235,共8页
High Energy Physics and Nuclear Physics
基金
国家教委科学基金
