正方形晶格上反铁磁Gauss模型的相变

The phase transition of anti-ferromagnet Gauss model on square lattice

应用键移重整化群的方法,研究了正方形晶格上反铁磁Gauss模型的相变,求出了系统的临界点和临界指数.结果表明,此系统存在有限的温度相变,与该晶格上的Ising模型相比较,系统的临界指数发生了变化.这表明它们属于不同的普适类.

Using the bond-moving renormalization-group technique, the phase transition of anti-ferromagnet Gauss model on square lattice is studied, and its fixed points and critical exponents are obtained. The results show that there exists finite temperature phase transition, compared with the Ising model on square lattice, the critical exponents have changed. It is found that they belong to different university class.