实轴上的超微扰理论
Superperturbation theory on the real-axis
摘要:
本文给出了实轴上Anderson杂质模型的超微扰理论。由此产生的杂质求解器可以评估动态量,而无需最大熵方法或Padé近似的数值分析延续。这使得求解器非常适合于研究多重态效应的动态平均场论内的固体。第一个例子,包括多轨道问题进行了讨论。
英文摘要:
In this article we formulate the superperturbation theory for the Anderson impurity model on the real axis. The resulting impurity solver allows to evaluate dynamical quantities without numerical analytical continuation by the maximum entropy method or Padé approximants. This makes the solver well suited to study multiplet effects in solids within the dynamical mean field theory. First examples including multi-orbital problems are discussed.
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