Journal
PHYSICAL REVIEW B
Volume 104, Issue 3, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.104.035160
Keywords
-
Funding
- JSPS KAKENHI [JP18H01860]
Ask authors/readers for more resources
In this study, the iterative perturbation theory (IPT) was reinterpreted and extended to capture strong correlation effects by modifying the IPT vertex using parquet equations, achieving efficiency and reliability simultaneously. The method was applied to several models to evaluate validity, showing good agreements with numerically exact methods in DMFT calculations.
Although several impurity solvers in the dynamical mean field theory (DMFT) have been proposed, especially in multiband systems, there are practical difficulties arising from a trade-off between numerical costs and reliability. In this study, we reinterpret the iterative perturbation theory (IPT) as an approximation which captures the strong correlation effects by mimicking the particular frequency structures of the exact full vertex, and extend it such that it can have efficiency and reliability simultaneously by modifying IPT vertex using the parquet equations. We apply this method to several models to evaluate their validity. We confirm that our method shows good agreements with the numerically exact continuous-time quantum Monte Carlo method in the single-site DMFT calculation.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available