Year: 2022
Type: preprint
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.
Source: arXiv (Cornell University)
Author: Rohe, Daniel
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4225620926