Interaction flow method reloaded
Abstract
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.
Cite
@article{arxiv.2201.04823,
title = {Interaction flow method reloaded},
author = {Daniel Rohe},
journal= {arXiv preprint arXiv:2201.04823},
year = {2022}
}
Comments
Subject to major revisions due to referee reports which cannot be met. Some content and dat will be remastered from scratch in an entirely new manuscript