有限温度格点U(1)及定模U(1)-Higgs模型Symanzik作用量的解析研究  

Analytical study of lattice U(1) and U(1) - Higgs models at finite temperature with Symanzik action.

作　　者：任学藻[1] 朱允伦[1] 陈莹[1] 

机构地区：[1]北京大学物理系,北京,100821

出　　处：《西昌师专学报》1997年第3期19-24,共6页

摘　　要：本文用变分累积展开方法(VCE)解析研究了Symanzik作用量形式的有限温度格点U(1)及定模U(1)-Higgs规范模型,并计算了序参量Polyakov线〈L〉及临界指数β。结果表明,采用Symanzik作用量的变分累积展开比Wilson作用量收敛快。The lattice U(1) and U(1) - Higgs models with Symanzik action are analytically studied at finitetemperature by variational cumulant expansion(VCE) and the Polyakov lines <L> and the critical index β are cal-culated. The results show that VCE of system with Symanzik action converges more rapidly than that of Wilsonaction.

关 键 词：格点规范理论 累积展开法 Symanzik作用量 

分 类 号：O551[理学—热学与物质分子运动论]