自旋为1的海森堡反铁磁体：级数展开的新结果
The Spin-1 Heisenberg Antiferromagnet: New Results from Series Expansions
摘要：
计算了正方晶格上具有易轴和易面单格点各向异性的$S = 1$海森堡反铁磁体的基态性质（能量、磁化强度、磁化率）和单粒子能谱。在系统的三个阶段中的每一个阶段中使用级数展开，以获得系统和准确的结果。确定了量子相变在易平面扇区中的位置。结果与自旋波理论进行了比较。
英文摘要：
We calculate ground state properties (energy, magnetization, susceptibility) and one-particle spectra for the $S = 1$ Heisenberg antiferromagnet with easy-axis or easy-plane single site anisotropy, on the square lattice. Series expansions are used, in each of three phases of the system, to obtain systematic and accurate results. The location of the quantum phase transition in the easy-plane sector is determined. The results are compared with spin-wave theory.
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