论文标题
地面相关性的扰动研究有效吗？
Is perturbative study of ground-state correlations valid?
论文作者
论文摘要
扰动方法通常被用来包括在随机相近似的扩展理论中，将基态相关性的影响包括在内。对于可解决的模型研究了这种方法的有效性，在该模型中可以与精确的解决方案进行比较。可以指出的是，尽管相互作用强度远远超出了扰动区域，但在某些情况下，扰动方法可取得良好的结果。
Perturbative approaches have often been used to include the effects of ground-state correlations in extended theories of the random-phase approximation. Validity of such approaches is investigated for a solvable model where comparison with exact solutions can be made. It is pointed out that there is a case where perturbative approaches give good results in spite of the fact that interaction strength is far beyond a perturbative region.
