采用SYMANZIK改进作用量的 SU(2)格点规范理论的变分累积展开研究(英文)  

VARIATIONAL CUMULANT EXPANSION STUDY OF SU(2) LATTICE GAUGE THEORY WITH SYMANZIK'S IMPROVED ACTION

作　　者：李红[1] 陈天仑[1] 王庆[1] 卢强[1] 

机构地区：[1]南开大学物理系,天津300071

出　　处：《南开大学学报（自然科学版）》2000年第3期35-40,共6页Acta Scientiarum Naturalium Universitatis Nankaiensis

基　　金：Supported by National Natural Science Foundation of China ( 1 97750 2 4 ) and Doctoral Foundation of Chinese Education Commissio

摘　　要：应用变分累积展开方法 ,将具有 Symanzik改进作用量的 SU( 2 )格点规范模型的内能和比热展开到第三级 .变分参数由主变分方法确定 ,并将计算结果与蒙特卡罗和标准 Wilson模型的结果进行了对比 ,证明 VCE方法可给出与蒙特卡罗方法一致的结果 .With the variational cumulant expansion method, the internal energy and the specific heat of the SU (2) lattice gauge theory with Symanzik's improved action are calculated up to the third order. The variational parameter is determined by the main valued method and the results are compared with the Monte Carlo results as well as the results for the standard Wilson action. It is shown that the VCE method can give a consistent result with that of Monte Carlo Method.

关 键 词：格点规范理论 改进作用量 变分累积展开 

分 类 号：O413.4[理学—理论物理]