摘要
应用实空间重整化群和累积展开的方法,研究了外场中特殊钻石型等级晶格上S^4模型的相变和临界性质,求出了系统的临界点和临界指数.结果表明,此系统除了存在一个Gauss不动点外,还存在一个Wilson-Fisher不动点,与该等级晶格上的Gauss模型相比较,系统的临界指数发生了变化.
Using the renormalization-group transformation and cumulative expansion technique, the phase transition and critical properties of the S^4 model on a special diamond-type hierarchical lattice are studied, and its fixed points and critical exponents are obtained. The results show that there exists a Wilson-Fisher fixed point besides the Gaussian fixed point, and compared with the Gaussian model of the special diamond-type hierarchical lattices, the critical exponents have changed.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第9期4901-4905,共5页
Acta Physica Sinica
基金
曲阜师范大学科研基金资助的课题.~~
关键词
钻石型等级晶格
S^4模型
重整化群
临界性质
diamond-type hierarchical lattice, S^4 model, renormalization-group, critical property
