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.
出处
《高能物理与核物理》
EI
CSCD
北大核心
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
关键词
格点规范理论
累积展开法
S-作用量
lattice gauge theory, cumulant expansion, Symanzik action