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

出　　处：《高能物理与核物理》1998年第6期492-498,共7页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金

摘　　要：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 finite temperature using variational cumulant expansion (VCE). The Polyakov lines <L> and the critical index β are calculated. The results show that VCE of system with Symanzik action converges more rapidly than that of Wilson action.

关 键 词：格点规范理论 累积展开法 S-作用量 

分 类 号：O413.3[理学—理论物理]