论文标题
相互作用流量方法重新加载
Interaction flow method reloaded
论文作者
论文摘要
最近提出的相互作用流量方法扩展应用于二维Hubbard模型的选定物理和有条理参数的示例性情况，远离半填充和完美的嵌套。在此方案中，自我能源是根据实频轴计算的，其对相互作用流的反馈通过动量依赖性的准粒子重量以简单的方式包括在内。将两种不同类型的自我能量反馈的结果与案例进行了比较，而没有反馈和现有结果，这是由于对假想频率的计算而产生的结果。解决了定性和定量影响结果的各种物理和非物理方面。提出了一些暂定发展的方向。
A recently proposed extension of the interaction flow method is applied to exemplary cases of selected physical and methodical parameters for the two-dimensional Hubbard model away from half-filling and perfect nesting. In this scheme, the self-energy is calculated on the real-frequency axis and its feedback on the flow of interactions is included in a simple manner via a momentum-dependent quasi-particle weight. Results for two different types of self-energy feedback are compared to the case without feedback and to existing results stemming from calculations for imaginary frequencies. Various physical and non-physical aspects which influence the outcome qualitatively and quantitatively are addressed. Some tentative directions for future developments are suggested.
