With respect to the three-dimensional XY model which attracts the most attention of our latter work's, we introduced the spin wave theory and the self-consistent mean-field theory applied in it.
对于我们研究工作的主要对象三维XY模型,介绍了自旋波和自洽平均场理论在其中的应用。
In the first chapter, we shall give a simple introduction to the mean-field theory and its history, research status and applications of chaos in BEC.