By using the mean-field approximation method, the critical behavior of the mixed-spin XXZ model with DM interaction on the cubic lattice is studied.
利用平均场近似的方法，研究了立方晶格上具有DM相互作用的混合XXZ模型的相变和临界性质。
2
This paper gives and analyses a general expression of the dispersion relation of one-dimensional lattice waves in simple harmonic approximation.
给出了在简谐近似下，一维格波色散关系的一般表达式，并对其结果进行了分析。
3
The coupled cluster method is improved with the random phase approximation (RPA) to calculate vacuum wave function and vacuum energy of 2 + 1-d SU (2) lattice gauge theory.